There's no way the model would actually break when Apple pulls in tens of billions USD every year off the App Store, a lot of it provided by whales in gacha gam

There's no way the model would actually break when Apple pulls in tens of billions USD every year off the App Store, a lot of it provided by whales in gacha games and online gambling services. A single one of those would be enough to keep the store humming (there are a few specific ones that bring in a billion usd a year by themselves) They could also just require developers to pay them a set % of gross even when using third-party payment processors. There is precedent for this, for example Sony requires this in order to approve cross-play between Playstation and other platforms. It could also be treated as a royalty model where you give them say 5% of your gross revenue to use the iOS platform and the 5% is baked into the normal 30% store cut (Unreal Engine works this way.)