My honest opinion:
As much as I don’t like Referback or the people behind them, I do want to point out that Fortune actually was the longest in violation, as Referback started their newest terms later (of course, if you count back to the 20% thing, then Referback were in violation longer but none of us pressed the issue).
Thus – if you are willing to put Fortune back up, you should also be willing to put Referback back up. I have to agree with Dom about there being some return for them to go back to their original terms – otherwise the next time there will not be any negotiation – you will be raped and that is that.