Has anyone mapped out all of the data brokers that are active in the US, what information they collect, what their sources are? I imagine a lot of that info is

Has anyone mapped out all of the data brokers that are active in the US, what information they collect, what their sources are? I imagine a lot of that info is proprietary, but I'd really like to understand this industry better. It's probably a foolish hope, but I really hope there are a few main choke points that one could opt-out of. If that's not possible, I could always try to inject bad data into the system, if I know what their inputs are.