Thank you for the chance!

"The product code you've entered requires ownership of another product before activation.
If you are trying to activate an expansion pack or downloadable content, please first activate the original game, then activate this additional content."

Are you sure this is the right key? It seems like this is for a DLC, but this giveaway is for the game itself.

I got another key. I gona send to you.

For the steamgifts staff: the key didn't work and he bought a replacement and that order got cancelled. He gave me another game as compensation which I appreciate. I'm marking it as received because of it.