> I think it unlikely given the harm it would do to them

Did it harm them in any real way that the original training material was also of questionable origin? Not the least.

We're being naive if we think this is not happening. Apart from some high profile enterprise contracts (which average Joe Physics Researcher does not have as they are using "free" credits insteador pay a personal account out of their own pocket), everything remotely attractive is being mined. Too sweet of a gold mine to pass by.

I'll stand corrected if an official statement from OpenAI/Anthropic comes out stating the opposite together with a whistleblower program worth its name. Until then it is safe (and reasonable) to assume that this is going on. The silence is telling.