Valid points. But I don't want my code to be used by big corporations and monopolies to train closed source LLMs that they're going to sell. Shouldn't I get to have a say in that?

For example, GPL controls what kind of projects can use my source code. Maybe there could be an addendum to GPL that requires all LLMs trained on the source code to be open source. Sure, that won't guarantee that Copilot-like bots won't be trained using my code. But it does give me a legal framework to stop big corporations from profiting off such Copilot-like bots without making them open-source as well.