Please stop repeating rumors with no evidence.

There is plenty of circumstantial evidence to support this theory. Looking at the rating history of the game.

I'm not so sure. It would have to use iAd on iOS to do display ads, and Apple would yank that access with a breach of the terms of service. I doubt he's still getting "tens of thousands" of dollars from ad revenue in Android alone.

I never saw any ads when I played it on android.

I did, but you probably didn't notice it because it wasn't in your face whilst you played the main game. I think it was shown after you had ditched. Clever.

(It was probably because I was always ditching and dying that I saw them; I was pretty hopeless at it, although when I plugged my Xperia S into HDMI, the phone ran noticeably slower so it was significantly easier to play.... just a tip for anyone out there....)