But I felt like the authors of this game realized how predatory most IAP are and while they didn't specifically say its disgustingly exploitive to children they did say they were trying to design a game that wasn't exploitive. After reading their article I'd say they are just giving away too much. I think the free to play X levels then pay to play more is not predatory IAP. It was bread and butter of the shareware scene for the better part of a decade during the pre-internet era. And that's what we're in right now with mobile that time period where the difference between amateur and professionals is invisible. So I think they're model is right they just aren't applying it correctly.