I have done extensive searching on the forums about the remove ads function, and do not see this being asked anywhere, but once a user purchases remove ads, isn't the button supposed to disappear? It is not disappearing when I test it on a 6+ (BB 2.0.1)
Yes, it should disappear. But only if you are doing true sandbox testing and make a "successful" purchase (or in production, obviously). Did you test any other devices and it was working there? Also, in case you were using the Xcode simulator, you can only test IAP on a real device.
This happens to me too. It seems to be a BB2 bug. Recently published games made in BB2 have all the same problem. Example: Sides or Fringe.