In their profit reports I am told that the 30% is not profit it just maintains the app store. I read that from some jailbreakers, they seemed legit since it was talking about how apple locks it down too much. It was in the earnings report, so they didn't have a reason to lie (I think). I wonder if they cook the numbers or something to lie about it.
According to the article [1] - App store made 11.5 Billion $ revenue in 2017. That's like 30 million dollars per day. I'm not even going to argue that you need such money to maintain a static binary distribution platform.
Revenue is not profit. I am not saying I believe them but it was in their earnings report. I think maybe it doesn't turn profit the same way that movies lose money.
