Yes I can - and it does display a key. The key is however already active on another Steam account.
The issue here beeing, the link was posted publicly, and somebody probably swooped the code before i could get to it.
It did work this time. Thank you. But just to let you know, this is a public thread. We are communicating via comments on the devlog "Drive for Charity".
https://klapanomgames.itch.io/sunset-drive/devlog/1004117/drive-for-charity