Epic can just offer their app in both Apple's store and its own store. It's just that Apple store prices will be higher according to Apple's commissions. If you

Epic can just offer their app in both Apple's store and its own store. It's just that Apple store prices will be higher according to Apple's commissions. If you like convenience of only using Apple's payment services, who's stopping you from buying it in App Store with higher prices? If Apple rejects the app from being available in its store, then again that doesn't affect you because you want to use only Apple approved apps anyway.