What it happens when this happens ?, 've seen a game like paper toss that has that number .
I wonder how you become rich when you have those downloads ?, what happens ?.
You can earn money from adverts in the game and in-app purchases.
Develop games in your browser. Powerful, performant & highly capable.
I'm not sure but I think Flappy bird did not have advertising ads and its developer made a lot of money.