I had a gifted copy from Kinguin get revoked on me, I don’t trust those grey markets, especially at those crazy low prices (50% off for a game that isn’t even out yet?) - and I never will again. No thanks. Plus, if anyone here cares about supporting games they love, avoid places like CDKeys, is my suggestion.
Of course, $25 is a great deal, so I don’t blame anyone for biting, but also be aware my cousin never did get even credit for the revoked keys. They are still “working on it”.