You're right and make an excellent point. But the other platforms are also going to have to work on increasing the revenue per app for the developer or obsolete

You're right and make an excellent point. But the other platforms are also going to have to work on increasing the revenue per app for the developer or obsolete themselves. So the current state of affairs might only hold for a few years or so. As well, there are a whole host of factors considered when a developer chooses platforms and while I don't know about how people weigh decisions, its possible that this number could come to irrationally? dominate considerations. So platforms competing over that number will have unpredictable, possibly undesirable effects to the outcome of the current equation for the leader at first and then everyone else. Just considering the other side, but I do agree with your above point.