Here's a list of false assumptions way too many users are making:
There seriously needs to be some clarifications. This has gotten way out of hand, judging by the comments--myself, I don't understand why so many are taking this the wrong way. Perhaps a F.A.Q. could be made about the rise and fall of invite codes, and the reasons for doing it, so those scratching their heads or getting angry can get some answers?
I hope this isn't off-topic.