I've had this quixotic idea that I could firmly click-wrap full-content behind some Terms of Service, where they agree to some not-unconscionable but rather serious obligations for any model that was trained on my stuff. Kind of like how the GPL uses copyright, except it's contract-law.

For example, a right to all their model-weights on request, plus permission to republish them.

Granted, this relies on some long-shot ideas, and the assumption that the legal system won't just say "big companies can auto-hack their way around a contract, but regular people have to obey it."