I can vouch for the fact that Apple does this sort of thing on a regular basis. When we were submitting an app update, they rejected it on the grounds that we didn't offer in-app purchases. This is apparently a problem because we offer a subscription on our website, even though we had done the same thing for years with no issue. Also, we had numerous competitors who were doing the exact same thing with no ramifications and had recent updates approved. Apple had no good answers and refused to talk about other apps. We also had no mention or links to our website or subscriptions anywhere in our app. I could go on and on about how ridiculous the whole situation was.