In a happy move that makes me want to dev a bit for mesa we have the following announcement [feralinteractive.com]:
Thank you to the Mesa community for helping improve support for Mesa drivers!
To spur you on, we’re giving dedicated contributors a special Steam Key granting free access to our entire Linux repertoire. That’s a lot of test cases…
If you have made at least 25 commits to Mesa in the past five years, email email@example.com with 'Steam' in the subject, and tell us your usernames for freedesktop and Steam.
See you in the repository.
Wait, twenty-five commits? I've done that in a single day working on rehash. Get your key before they change it to pull requests.