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I want to mention another infection happening at payment terminals and ATMs if you're using your credit card in a foreign country: You get a message saying "Would you like to pay in your own currency? Click [Accept] or [Decline]", and there's fine print that says there's a 12-15% currency conversion markup.

To give a concrete example, if you're an American traveling in Brazil withdrawing cash from an ATM or buying something for BRL 500, you'll be presented with an option to pay BRL 500 or pay just US$110.58 in your own currency (with text saying conversion includes 15%).

But the typical American (and Canadian) credit card adds at most 2.5% to the Visa or Mastercard exchange rate, which is at most 0.5% higher than the interbank rate. So basically by clicking the wrong button, you're paying an extra 12% to the payment processor. In the example above, your credit card would have charged you about US$99.04 had you declined the conversion, and saved you $10.

I can't imagine a situation where it's to your benefit to accept the "conversion service" they're offering. I wonder if the payment processor is kicking back some of the profit back to the merchant because this swindle is spreading everywhere.

The worst part is that a couple of people that I've tried to warn don't get it. They still think that they should pick US$ (or whatever their own currency is) because that's what their credit card uses.

Some are even worse than this. When I was in Portugal, the machine said "Press (1) for GBP. Press (2) for EUR.", then on the next screen, after you select "(2) for EUR", it says "Rate will Apply. Please confirm. (1) Accept conversion (2) Reject Conversion". If you select "Accept conversion", it overrides your currency decision and you pay in GBP with their markup fee...

It's a complete con...

This happened to me, but it was the merchant that clicked it...

I inserted my card, and then was reading the text and choice that popped up on the screen, and while I was reading it trying to decide which I should click, the merchant grabbed the scanner and clicked the accept...

Of course I got a charge notification on my mobile app immediately and noticed that it was way higher than it should have been, so then I had to go back to them and get them to refund the transaction so we could do it again which took forever and a manager etc etc.

Currency conversion is not only incredibly fraught with traps, but believe me, even for very intelligent and research-savvy individuals, if you're not a professional in this area, you'll struggle to see all the pitfalls and still fall for them. I don't consider myself stupid, but I spent several days seriously researching it, and ultimately, after being exploited by several new tricks, I gave up. I consider those losses as a part of travel expenses and avoid letting it amplify my losses, that ruining my travel. PayPal is even more blatant fraud. You never know how much money is left after a transfer or withdrawal until you're surprised, and then they'll say they mentioned it in some tens of thousands of words of agreement that they would deduct this amount.
Nowadays banks usually allow you to block DCC (dynamic currency conversion) and it is definitely worth it if you travel.

https://en.wikipedia.org/wiki/Dynamic_currency_conversion

A few years ago I was checking out of a reasonably up-scale hotel in Barcelona early in the morning.

They punch numbers into one of those wireless hand terminals. I tap my card, enter the pin and then before I can react to what the screen is now saying they've punched the 'Accept Conversion' button and submit it. By the time I realise what has happened, it's too late and has started printing the reciept.

I insisted they reverse it and redo the transaction without that - the staff didn't understand and didn't care they'd cost me another 10-15%. It really adds up for a week long stay.

PayPal does this too. They will offer to do the currency conversion at an outrageous rate. Not quite 15%, though always substantially more than Mastercard’s rate of the day.
Speaking of payment terminals.

Payment terminals used to have good UX, they all clearly showed you the price when paying. Tills had displays with the price facing the customer which were clearly visible.

Now traditional POS terminals have been replaced with tap and go devices by the latest fintech, non of them show the price to the customer by design. Instead you tap a small puck and you hope the price charged is the one asked only to find a transaction fee on top when later check your balance.

It's a deliberate design choice to withhold showing the price on these devices. It's cheap to add a small LCD panel to them, the technology previously existed and still exists however the choice have been made not to.

This was being asked as long as I remember (~15 years now?) but the conversion commissions were around 2%-5% at most. 15% is egregious.
As others have said, currency conversion has been a well-known "scam" for as long as I can remember. I'm sure Martin Lewis has been talking about this since at least the early 2000s in some form.
An especially egregious case I've encountered was at Berlin train station.

Normally in Germany, you've got those distinct card terminals with a display where you see your total before paying. Some of those have started nagging you for tips which you need to explicitely accept or decline first before tapping your card. Not in this case though: after you've ordered your food, they point you to the combined order/pay display and while you awe at the technology marvel of combining both, you tap your card on that and then you notice that 15% tip has been automatically included and charged. You needed to notice some small text and small buttons in the corner of that display beforehand and actively tap on "0%" or something before tapping your card. I'm already furious they've let this tip begging to be added to the card terminals, but charging tips without explicit consent should be completely illegal.

Ooooh do the one where hitting ‘payment’ on the app buys $25 of store credit by default rather than just paying and deducts the 9.64 from that credit.

Then when you spend down the credit to $2 any attempt to buy something that costs more refills the credit.

Starbucks app btw. You have to specifically pay with card on the payment screen to avoid buying credit and paying as above.

All these silly excuses people make: "I tip when the service is good", "I tip when conversation with bartender is engaging", "I tip when the server runs around me in circles, I count the circles and convert it with an exchange rate of $2/circle". Wow.

I'm from EU, so ymmw. I simply don't tip. Why? Because I don't have to. And if I don't have to, then I don't. It is that simple.

I have a feeling that this HN submission is rather some test run which dark patterns work well on technically affine users. :-)

Having the knowledge which dark patterns even work well for technically affine users while still being "socially acceptable" can be worth a lot of money to specific companies.

This reminds me of a gag voting simulation website from the early 2000s when BushJr was running for president against Al Gore. The (maybe flash?) game simulated voting, but when you tried to click, the buttons would “run away” from the cursor, or change size to avoid being clicked… dark patterns… always fun to “play against”.

More recently though, I must say, YouTube has really jumped the shark in terms of perfecting their dark patterns/algo stickiness. I can’t even go to the site without immediately forgetting my original intent.

Buy me a coffee? Jokes on you I just practiced avoiding this.
I like how at the end the author tries to get you to give him a tip with the buy me a coffee link
I once went to go pick up takeout and they covered the no tip button with a sticker. I was so confused so I put in 10 cents because I could find the button at first. I stopped going to the place since.
I help a blind friend order his groceries online from Walmart once a month. He's disabled and on food stamps (EBT/Link). The groceries are all taken care of, but the site always requests a $30 tip for the driver.

I drop it down a bit and pay it on my credit card for him, but what's the right way to deal with this situation?

is there a name for the phenomenon where a user immediately assumes the smallest and lowest contrast button on an interface is the option they want, before actually reading any of the words?
Tipping culture is properly weird to me as an European, I probably tip much more than the average European and I still find these prompts obnoxious, and they're popping everywhere in Barcelona. No thank you, that's a part of the U.S. culture I certainly don't want to see imported over here.
Nice! I’ve started only tipping on fridays for coffee, etc. I’m a great tipper at restaurants But being hit up for a $5 tip for a $4 drink is way wrong. I’d tip you, but today is Thursday!
Fun idea but gets boring when patterns repeat in seemingly random order. The timer also sucks a lot of the fun out of it and makes the game too easy, because the patterns can’t be dark enough. I just plowed through without ever even looking at the wrong options, because it was so obvious what the right one was.

I’d much rather the game progressed in a fixed logical order and the choices became less obvious without a timer. In other words, I think this makes more sense as a puzzle game, not a reflexes game.

The "buy me a coffee" button at the end is :chefskiss:
I was gonna tip the developer but it feels like losing now
It should be illegal to solicit tips when asking for payment.
Great game. I squirmed at typing "no tips" the first time but second time was fine. I'm going to practice this a lot more to tonne down some (frequently abused) empathy
First I will say, I am very much against dark patterns and I believe servers should be paid a fair wage and not have to rely on tips.

But until that I do tip for dine-in service. But I found the "buy me a coffee" link on the button of this to be much funnier / ironic than it probably should have been.

It's also missing what I think is the worst dark pattern:

Having no option not to tip at all. Instead requiring that the customer press "Custom" and manually entering "0.00"

Besides payment kiosks having tipping on by default, I wonder how much of this is an indicator of inflation over the past 5 years. Businesses have dramatically broadened tipping on payment kiosks to avoid having to increase wages. "We'll still pay you 12 dollars an hour, but now you get tips!"
Now more than ever it is against your best interests to tip on any automated platform. The data collected will definitely be used against you in algorithmic pricing.

These days it pays to aggressively demonstrate that you are price sensitive and will delay or cancel transactions at the slightest whiff of additional expense.

I only ever tip off-platform or cash even if I pay with card. Also that helps to enable my gift to go only to the service provider. It fucks me on some platforms but I find that an acceptable cost to not get algorithmically spitroasted. Besides, it also helps to eliminate predatory platforms from my ecosystem.

Actually doesn't make for a bad reaction time and processing game since you need to think fast and avoid distractions.

Mobile offers a speed boost for taps but heavy nerf to text entry tasks.

For X-Files fans who might be unfamiliar with the reboot, the reboot has actually one episode dedicated to this - S11E07 - Rm9sbG93ZXJz, Mulder/Scully don't want to tip the robotic self-service and are punished for it.

Available to watch here: https://www.tvseries.video/series/the-x-files/season-11-epis...

The most shocking part of the game is the price of goods! $14, $17 dollars for one meal to be eaten standing up? Wow. Here in Paris sandwiches cost between EUR 4 and 6 (usually 5), with a "menu" option that includes a can of soda and sometimes a "dessert" for 9-10. Anything above that would be considered extorsion.
I've considered going back to cash just to avoid these. The social convention used to be the seller writes a price and if the buyer can meet that price the deal is done. These abusive card machines have brought "tipping culture" to the UK and I hate it.
I had food delivered the other day and the suggested tip included tax and the delivery fee in it's calculation.
The darkest patterns are fees that don’t exist . Like 300% tax fees and nightly parking when parking is free
Really nice game OP. Would you consider making a version of the game with no timer?

I was thinking in sending this link to my family but probably the timer is really fast for them but I think they could used your app as "training" so they know how to spot a dark pattern in the future

Made me want to sing that classic song from the animated movie "sausage party"

"Just the tip"

Reminds me of the game Ad Attack from Neopets. Back when the plague on the internet was popup ads.

Wild how we're back in popup hell now just like we were back then, even though the method for web popups is different now.

I'm one of those cowards that always succumbs to the pressure and ends up tipping, but it bothers me enough that I just won't buy anything if I know I'm going to get asked. This is good training.
Got to round 8 - was too slow with the notifications popping up!

How many of these are real dark patterns? The "new entry suddenly prepended to the list" one I have seen before.

The time limit accurately simulates the experience of being under the accusatory stare of the person who handed you the machine
I tried to tip OP 0$, but that wasn't possible.
Are any of these illegal in the US or Canada?
Are all of these dark patterns seen in the wild? OR are some of these merely a dreadful warning of what may happen?
This is where I want a digital wallet on my phone with payment details that I control (no tip, lowest fee possible)
It's one thing to read about dark patterns, it's another to feel your cursor being baited in real time