Being a bug, though, it would record with the fidelity of the Uber app. Which is a lot more than every five minutes.
What I'm getting at is that it's pretty straightforward and easy for Uber to maintain a database of every user's locations at all times, even if they aren't active users. This kind of data is valuable. Assuming Uber isn't already doing it, all it takes is one mid-level product manager to initiate a small project to kickstart it.