It is all simply for bragging rights and it is by design. This is what is called 'competition' to the corporate business world and it is what keeps it healthy. However, is it really competing when just about all sides of the camps are equally being fucked with one way or another? The true winner above them all is capitalism. The more people fight against eachother to justify their alignment, the more money comes in.

Mobile gaming is barely gaming at all, it is more like, your money is what is what you're playing with than anything. There had been honest attempts before, to bring actual gaming to mobile, but with so many games being made with intent to scam, there's no point.