BranjoHello: Some people already entered so I won't delete the giveaway, one of them should have this game. There's no way I'm going to activate something I don't intend to play, it's not my style.
It's not a big deal if someone entered, they'll be "refund".
But if you didn't activate the key, a re-roll of akhliber's giveaway is a better idea from my opinion. You can be banned for SG by regifting the key AND by not activate a game you won.
It's just an advice, you're free to do what you want.
EDIT : I just realize, asking a re-roll is possible if the winner mark the gift as "received" ?