Apple wants 30% of your subscription rate if you charge by subscription. I know this b/c I have had the same thing happen, and it's complete bs.

This is why you should be publishing an API and having a "3rd party" writing and publishing your app, so there is no revenue behind it for the douchebags at Apple to screw you out of.

Apple won't care if your app is free and uses a public API, but if there's ANY money in it, they want their 30%, especially if it's recurring revenue.