Absolutely. And many private individuals and companies buy into these databases as well.
I personally do not currently have a membership to one of those databases, but I have asked my boss to subscribe our office. Several of my clients use them, so I do have second hand access.
As to the people worrying that the city would amass a database of which church or which gay bar you go to: Private corporations already do, and guys like me buy access. Going to your mistresses apartment every thursday during your "poker game"? You wife's divorce attorney knows. Etc. Etc.
So - the big discussion ought to be this: If people with money are buying into this, why should we prevent cops from doing the same? Because that is the literal meaning of privilege.
Instead, lets have a discussion of when the data should be dumped to the public cloud, and when the data should be subject to subpoena.