> I think it's a losing game because there's enough people willing to give it their intellectual property for free that by the time your get your stuff removed it's already found something similar somewhere else (Drainage my boy!)

I don't think many would find that objectionable; I don't think people who object to the manner GitHub (and OpenAI, etc) has gone about this generally object to the existence of Copilot (or large language models or image generating AIs) itself, so I don't see think we'd be "losing a game". I personally would see it as a great result if these companies were respecting licensing in a rigorous way, or otherwise ensuring that this was more of an opt-in system (I'm not a supporter of intellectual property broadly).