The listing, Galactic Junk League [bonus key] has ended.
http://store.steampowered.com/app/562590/Galactic_Junk_League/
Each key will give a player the following items:
Cyberpunk ship + 3 cyberpunk building blocks
Pilot License for 3 days
5x Space Whisky
300 Space Credits
To redeem the code, you first have to download the game for free on Steam. Afterward, log into game and press ESC, click on 'Redeem Code', enter the code and you're ready for business!