Yes and I’m sure if Apple allowed side loading those side loaded apps would be successful. Just look at all of the popular profitable mainstream apps for Android that are not on the Google Play store.
But it came out in the Epic Trial that 80% of App Store revenue came from pay to win games. Most of the other big none game money makers stopped supporting in app purchases years ago - like Netflix and Spotify.
Hulu only allows in app subscriptions for the streaming video on demand level. They don’t allow in app purchases of the much more expensive Hulu Live offering.
As far as I know, you can’t subscribe to any of the cable alternative streaming services via in app purchases (Hulu Live, YouTube Live, Sling or DirecTV).
New subscribers to Netflix haven’t been able to sign up through the App Store for ages.
It’s very much a business decision whether they allow in app purchases.
