I sit in an airport playing candy crush. These people are geniouses in the most horrific way. Like a sparkling jem that absorbs your soul. Or a toad that if you turn up the heat slow enough. It won't jump. It'll sit there happily and die in a boiling pan. From my time playing candy crush. I can tell you that the way they weave IAP is all about addiction. How it works is something i'm not sure...