Depending on state, it is illegal for companies to do a credit check for employment. Perhaps they are using it sell your data to some shitservice they use but it can't legally be used in your location.
This is not intellectually rigorous. In locations where "it is illegal for companies to do a credit check for employment" they cannot perform one. Because they cannot perform one, they cannot be "using it [to] sell your data to some shitservice". More specific to my anecdote, I have always been in states where it was allowed to be used for employment purposes. But even if I wasn't, your speculative scenario is not internally consistent to itself.