I think the other thing that sticks out is the prohibition for developer to charge different price in and out of the app store (seems to be somewhat relaxed, fo

I think the other thing that sticks out is the prohibition for developer to charge different price in and out of the app store (seems to be somewhat relaxed, for example expressVPN, or maybe the trick is to not offer the exact same bundle?) and the related prohibition to mention the price difference when subscribing outside the app store. If apple was so confident in the value of the app store they would let the consumer make the choice instead of preventing even a hint of competition. e.g.: Tap here to subscribe right now for $X (monitor your subscription in the app store app). Subscribe on our site for $(.7*X) by entering your credit card information. Then let apple adjust the numbers until they have the same amount of signups as before, that would let the customer decide on the value of the "Apple Convenience Tax" instead of preventing information disclosure.