App Store payments are independent of customer service for the app itself. App developers would have to provide that either way. App Store refunds are not that

App Store payments are independent of customer service for the app itself. App developers would have to provide that either way. App Store refunds are not that different from credit card chargebacks. They mostly happen automatically, with some automatic abuse mitigation as well as a mechanism for the developers to report abuse. With Stripe, foreign exchange is an extra 1%. The rest of those are taken care of as part of the 3% fee. It doesn't cost that much to process payments. The one nice thing about the App Store is the centralized recurring subscription management. Seems like a nice juicy low-hanging fruit for Strip to disrupt now that they're allowed to.