[brcmthrowaway]

1-3% of payments does not run an app store for a billion users.

[heavyset_go]

Apple's profit margin on the App Store was about 80% in 2019[1].

Looks like 3% to 6% fees would absolutely run an app store.

[1] https://www.bloomberg.com/news/articles/2021-05-01/apple-s-a...