> Ads will pop up once in a while and you'll earn coins as they appear. This means the longer you play the more coins you'll receive.

So you're not paid to play, you're paid to view ads.

> Don't worry though we use a non-obtrusive advertisement system so ads will appear as notifications and viewing them is optional.

What ad company would pay you if their ads aren't displayed?

> (We'll only show you ads that interests you)

So you collect data, but what kind of data? How often?

Well, at least I'm paid to be tracked, unlike Google and others...