I think that the primary reason that games are more profitable on iOS is because a lot of games are using the free-to-play + in app purchase model and there are

I think that the primary reason that games are more profitable on iOS is because a lot of games are using the free-to-play + in app purchase model and there are a lot more iTunes accounts with credit cards linked that can make purchases compared to Google Play accounts, so Android games tend to rely more heavily on ads.