But that's all just a rant. Your core point is completely correct. If you want readers, you have to cater to this 'push' mentality, I think.
That's unimaginable to me. Most of the writers I read publish infrequently. Email is great. I don't have to be on any social media. Articles come in and I can read them at my leisure.
Most people don't read most newsletters. Some people read some.
This Saturday I sent an email. It has since been opened by 26% of my subscribers, that's 4,600 people. 780 people clicked on a link.
I tweeted the same email as a link and got pretty good engagement! 20 likes, 2 retweets – that's decent for me these days. It was seen 1400 times. 78 people clicked on a link.
I have roughly the same number of followers as I do email subscribers.
Sadly, open rates are no longer a useful metric in the absolute, at all. Some email providers will block all tracking pixels (so those people look like they never open anything, unless they click the link) and others will proxy all images, so they fire all tracking pixels systematically (so these people look to you as if they open every single email).
The only use you can make of open rates today is relative: "was the open rate higher or lower this month than last month?"
But it's extremely unlikely that your actual open rate (and list of who actually opened) is anywhere close to what the stats show. The only thing that still makes sense is click rates.
Perhaps it is even a better solution than website that vanish eventually. I might one day make a newsletter with links like:
example.com?re=you@yourwebsite.com&article=1234
Then mail you the requested article. With RE: and the same title they will even be threaded.