Keys on this site and your rules.

No, if you win a game on here you need to activate it or you will be suspended from the site or insert another punishment here.

No. All keys that you win on SG must be activated on your associated steam account within 7 days of winning. See the FAQ under the help tab on the top of the page.

FAQ

If I win a game, can I regift, trade, sell, or remove it from my Steam account?
According to our guidelines, no, all games you win must remain activated and redeemed on the Steam account you used during registration. Failure to activate games you have received will result in a suspension.

Oh my god, I make it,
how do i, do i have to cancel the gifway?

Yes, if you are trying to regift something you won then you have to cancel the giveaway. There is no penalty for canceling a giveaway, so long as you do so before it would have ended.

I cancel the gifway, Thank you very much guys...