Yep. That's what you get when you do stuff like this. People register just to get the key and not only that they will claim that one that you give them is invalid so they can get more. As long as you don't mind that it's totally fine .
Man, I need to get rid of these codes anyway, so getting cheated out is not that bad.
-gives CyberMonkey the DRM-Free Link for Rocketbird anyway along with The Binding of Isaac Code given by Pepisolo-
-gives DieCoolly my code for The Binding of Isaac and unlocks yet another Bundle-
-gives Prim3 Bastion-
You keep forgetting updating the signature
This time, I have 2 games I can't fit in due to character limit!
...-looks at the Humble Popcap Bundle for Bejeweled 3 only...but then what would I do with Peggle Deluxe, Bookworm Deluxe, Escape Rosecliff Island, Feeding Frenzy 2 Deluxe, Plants vs. Zombies: Game of the Year Edition, Peggle Nights and Zuma's Revenge!?-