So the frozen hearths seem to have been deleted

There is no key.

I noticed a lot of them said things like 'we will email you a link', so I did wonder if there was a way to fill in half the form and have the winner claim it. Some might fall for it thinking it was a gift system like humble bundle. I'm not sure if that's how it was done but it the only way I could see them exploiting the current system.

Good riddance. Freebie giveaways should "earn" negative CV.

i send the game or the key to the winner e-mail address

The key appears after a few hours

that sucks. I have a key from an old groupees bundle I never used.