This hasn’t really happened on Android or desktop open platforms. There are alternative app stores, but certainly not one for each app, and it would be a self-i

This hasn’t really happened on Android or desktop open platforms. There are alternative app stores, but certainly not one for each app, and it would be a self-inflicted distribution wound for an app to go exclusive to a smaller app store. Having a uniform way to handle payments is a great feature, but it would happen naturally if payment terms were competitive with industry norms instead of extractive prices that require a lock on distribution.