We combine data across all of our customers, so that if we find a fraudster on one site, we can alert every other site where the person has an account. I think there's a lot to learn by having sites aggregate all their knowledge about bad actors.
Secondly, as I was reading your privacy policy I noted that your condition on non-collection of data is for users to not use any products or services that "utilize the Service". That is all well and good, but you only "encourage [your] customers to describe their use of the Service and other technologies that collect user information in privacy notices that are displayed to users." [1]
If one of your customers chose not to disclose the fact that they are using your service what recourse does a user have? Is there any 'opt-out' option that lets me choose to not be tracked by you (with the understandable restriction I _can't_ use your customer's services)??