*I just got a response from DAZ copyright staff and they see the legal problem being discussed.  I think this was a genuine oversight on their part, they tell me they're going to discuss this with their higher-ups and decide what to do.  It being the weekend, I guess this will have to wait until Monday or later.

That is good news.  I'd suggest though if you are going to make a living freelancing in the 3d world that you retain both a lawyer and an accountant.