Who controls glibc?

> It would seem GNU needs glibc more than glibc needs GNU, so perhaps the current glibc maintainership should just find another home for it.

Well that's the issue isn't it? Rights are irrelevant here and in most places and it's an issue of might. Does glibc depend on the FSF for funding that Stallman can order them to drop? Is "glibc" a trademark that the FSF owns? Are there contractual obligations in play that stops the FSF from cutting such funding to coerce them? Even if they stop funding will glibc be able to just secure funding under the auspices of something else? — those are the questions that actually matter here.

Rights exist on paper that Linus wipes his butt with — in the end of the day who controls glibc is decided by who has the might to force it to do its bidding.