Unfortunately it is not Opensource yet - https://github.com/fireducks-dev/fireducks/issues/22
replies(2):
GitHub always been a platform for "We love to host FOSS but we won't be 100% FOSS ourselves", so makes sense they allow that kind of usage for others too.
I think what you want, is something like Codeberg instead, which is explicitly for FOSS and 100% FOSS themselves.