Check if this key isn't for this game instead, which is currently in a bundle:

https://store.steampowered.com/app/963940/Edge/

There are two games with the name "Edge" on Steam. The giveaway you posted is for this one:

https://store.steampowered.com/app/38740/EDGE/

Note that the second game's name is all in uppercase.

Hello! Thx for the chance, but:

"The product code you've entered has already been activated by a different Steam account. This code cannot be used again. Please contact the retailer or online seller where the code was purchased for assistance."