Your math is a little sloppy. Nothing necessitates that "3 times as many" users on a platform equal more revenue than another platform.
So, if iOS users overspend Android users more than android_user_count/ios_user_count times, iOS still offers more revenue.
Average spending and profit margins count as much, if not more, as raw user count. The same way that the Mac, say, has around 15% of the laptop market share, but takes home around 80% of the laptop market profits.
So, if iOS users overspend Android users more than android_user_count/ios_user_count times, iOS still offers more revenue.
Average spending and profit margins count as much, if not more, as raw user count. The same way that the Mac, say, has around 15% of the laptop market share, but takes home around 80% of the laptop market profits.