Interestingly, even the Warez Scene has standards, and no commercial backing. They're enforced, too.
To see the actual standards, you can search for "standard" on https://defacto2.net/search/file
There's a free book that covers that topic:
https://punctumbooks.com/titles/warez-the-infrastructure-and...
Not quite a counterexample, since piracy derives all of its value from commercial works, and those who want access to them.