I'd say they were similar to the credit ratings agencies* in the obvious conflict of interest in taking payments from the entities whose creditworthiness they "objectively" rate, except a little more willing to give A+ ratings to entities that don't even exist and rebill scammers. They're a non-profit, so there's probably nobody raking in particularly large sums of cash from their shady or sloppy ratings, but it would be daft to rely on them.

*who, if there was any justice in the world, would have become the first casualties of the credit crunch, along with their business model