The question was not whether unregulated markets spawn "trusted rating services". It's whether society could function with private rating services in lieu of regulation.

Actually, he is not moving goal-posts, he is just asking for the second half of his originally stated question to be answered. I know it is silly, and probably sounds like nitpicking to you, but please, don't make false claims, particularly when they are just veiled ad-hominem.

But it does appear that he has a legitimate question (whether it is different from his original question or not)

These are both government regulated non-profits. Compare to the BBB.