That won't ensure that you won't have problem in case it doesn't work, for cases like this I'd suggest entering this group and making a group-only giveaway.

Ah, I see.
I'll do that next time
Thank you.

Thanks for the giveaway!
Key could be activated, but was for Sucker for Love: Prelude- which is a free demo not the appId linked to giveaway.

No complaints though from me :)