I have doubts about whether it is legal that anyone get a
open source software and publishing on the greenlight (Steam) , asking for donations
does not represent the official development community, or not being any forked project.
Just get copy/paste and attempt to exploit taking advantage for own benefit. This is permitted in good sense?
If not and is illegal, help to report it.
If allowed , then i suppose that anyone can pick up any open source and try to donations or to sell with dubious support and updates.