iPhone broke 10% market share before the iPhone had an AppStore. So that logic doesn’t work. Without iPhone developers wouldn’t have an AppStore, and the Apps also help Apple, but those also exist on Android. So Apple makes tools, a market, a way to easily get payments, in multiple countries all over the world, and in return, 30%. Most App developers are very ok with this arrangement. The only ones that aren’t, are the huge companies that have grown big enough to to do that on their own. They can now do that in the EU, and just pay 45k a month for the tools to do so. That’s not much for those kind of sales numbers.