My guess: Apple needs to justify a 4 figure pricetag after taxes. This isn't necessary with the other devices, but since the X probably needs a hand, this was the strategy: fish for higher odds of good reviews from the upstarts and ones who'd stand to gain traction by claiming "First to review!"
Source: I've been through this exercise in the late 00s with other hardware vendors.
By comparison, an iPhone X costs $1,700, only $600 ($25 per month) more than a “free” phone . The reason is in two years, you’ll be able to sell your used X for around $400.
> Create a multitude of reasons for consumers, of all types, to justify spending $1,000 on a phone. Although it’s a subsidized cost, many consumers have not considered the true cost of their iPhone ever. Now, with many press outlets leading with the $1,000 total cost angle, Apple needs to combat that perception.
Who is subsidising the costs of iPhones? Apple? Do they sell them at a loss? And why would consumers want to consider the true cost if they never have to pay it themselves?
In the end, the consumer pays the subsidy.