The total amount of the transactions are $58B yearly for all app stores and is growing.
Doesthe $58B include Apple ? How important is Apple in the app store ecosystem ?
Would Apple adopt in the near future AppCoins protocol ?
I think it includes Apple.
The Apple platform still has more revenue than Google Play:
https://www.androidauthority.com/google-play-store-vs-the-apple-app-store-601836/I don't think Apple and Google would join the protocol in a first stage because they are incumbents.
The natural move is the independent app stores: Amazon App Store, Aptoide, Samsung Apps, Yandex, 9apps,... to drive the protocol.
Those probably are 15% to 20% (maybe more) of the market. With a strong protocol and OEM support they can worth more than 20%.
And all those traffic using AppCoins is the big opportunity.