I don't see it in the article anymore, but it also had Kingdom Rush Origins (careful, it is it's own game. There is also Kingdom Rush vanilla from what I saw on the google play store). It did distinctly show that it was originally 3 bucks or whatever.
But I haven't looked at it or the snowboarding games yet. I guess the snowboarding games do feature ads though by your reaction. Ah well. Maybe they are fun anyway though. I'll give em a try.