That's what I don't understand: what price can't I discover? Things like: how much Netflix costs, or how much something on Amazon costs, or how much a NYT subscription costs? I'm struggling to think of an example of what you're saying.
This is even more egregious when it comes to Spotify, which is unable to compete evenly with Apple Music. I wonder if Apple Music has to give away 30% of it's revenue to a payment processor....
If Netflix did offer in-app subscription (through Apple), and charged it at a higher rate to account for Apple's cut, it would be forbidden from telling it's more expensive because Apple takes a cut, or that it's available for cheaper on their website. Apple even forbids Netflix emailing their customer after signup telling them it's cheaper on their website.
I think that has changed now for Netflix in particular, but not for some other types of apps?