I think there is an argument to be made that Copilot is producing derivative code, though. It may produce copies verbatim, and that's a violation, but far more

I think there is an argument to be made that Copilot is producing derivative code, though. It may produce copies verbatim, and that's a violation, but far more often, it produces a mixture of things it was trained on, most of which probably have some sort of license requiring attribution at the very least.