This is called Private Contact Discovery Service and for the sake of transparency (and if reaction to this thread), here is another telling info, recently published:
IMHO, accepting this as trustful and justified or not (by considering other available options), my personal interpretation of it (in context of seller … user or perhaps in context of both) is actually what counts here or there, for my private or some other user needs.
Here is another expertise: “Ultimately, the federal government is going to have to step in with blanket legislation that will take precedence over the fractured state-level initiatives.”