So you think there's a lot of people who just browse the play store everyday?
If my personal experience is not enough what about yours? Have you done some kind of research?
About ads that's just a personal decision by the developer and Google has nothing to do with it. Most developers just publish the same fdroid version on the play store without ads
Most of the negative reviews on steam are about the game NOT being a successor of the first so as always I'm confused ;D I think I'll pirate it