Earlier today when Apple announced in-app subscriptions would be available to all they also updated the iOS App Store review guidelines reflecting the change. And it looks like Apple threw in a few additions, one which specifically warns against developers who "cheat the system".
If you attempt to cheat the system (for example, by trying to trick the review process, steal data from users, copy another developer's work, or manipulate the ratings) your apps will be removed from the store and you will be expelled from the developer program.
That's a pretty stern warning to devs who piggyback off of the success of other developers, and will hopefully help cut down on other manipulations of the system we've seen before. Other additions in the updated guidelines include:
We're still combing through the update, but let us know if you see anything big we might have missed in the comments!