People are getting lost in the weeds and ignoring the simple, fundamental fact that these companies are making fortunes off of labor that they didn't attempt to compensate the laborers for.
"Property" and "IP" discussions are distractions; no amount of it can rationally get us around the utter unfairness of what occurred and the way it will warp our economy at a basic level if not addressed.
It's not even enough to make the weights and models free; access should be free, and everyone who hitched their horse to this wagon should be on the hook for keeping the systems running, on their dollar. They took ownership of a venture that is short one (1) "Humanity's entire cultural corpus", and the only question is if we're going to issue a margin call.