I suspect their basic service is to outsource responsibility. If each lender does their own due diligence and risk ranking, any lender that has an above averag

I suspect their basic service is to outsource responsibility. If each lender does their own due diligence and risk ranking, any lender that has an above average failure rate will take a lot of flack from their investors and regulators. If they say "We use the same scoring formulas and credit files as everyone else", they can push the blame back to the bureaus.