@gabek If they want to fork #Owncast, they legally can, but they should not call it Owncast anymore. I know #Mastodon & #WordPress are open source as well, but they vigorously protect their trademarks to prevent this type of confusion.
If possible, I would encourage them to rename their fork something else. If they refuse, let us know which company it is so we can avoid doing business with them.
@gabek @darnell it's not a company that need to own it, but a legal entity and there are many such structures (though those vary by jurisdiction). There are things like co-operatives or nonprofit organizations (where again the definition varies by jurisdiction).
For example, the Debian trademark is held by the non-profit SPI 501(c)(3) in the US: https://en.m.wikipedia.org/wiki/Software_in_the_Public_Interest
Though there are lighter alternatives if no donations are expected to be handled.
@gabek @darnell it is reasonable for an individual to hold the trademark until such a legal entity can be established, then the trademark transferred.
If there's an active threat of a company registering the trademark themselves, consider doing that preemptively