Earlier quoted context omitted.
That money isn't going to the folks who wrote the code to begin with though. I think that's where "it should be free" has merit, GitHub is making money on the backs of others.
Why should the money go the to code authors in the first place? All training data is available under permissive licenses. Assuming you're not overfitting on specific code sequences (which would require attribution - and yes, I'm aware Copilot is not immune to this problem and it needs fixing), I'd say this is fair play.
Copilot isn't honoring the license, so why does it matter whether it was under a restrictive or permissive license?