Key given by Nutlope as compensation for playtesting Death by Game Show - a game which is actually a prettty decent 1.5D RTS but apparently is plagued by marketing issues.

The developers of Death by Game Show made a $50 Steam card giveaway for players who earned $1B in the game(which can be achieved within a couple of hours). No one has attempted to reach that score since that was posted (only 2 people previously reached it, me being one of them), and they've extended it to players who managed to get an achievement (earnable within an hour) or created workshop content. I think their intention was creating more sales, but it appears this failed miserably. The giveaway is still open until July 8th, and the game is being sold at $2.49 throughout the summer sale - its lowest price as of now.

Game marketing looks difficult :(