They are almost all business travelers, so multiple possibilities - A big one is Uber travel is trivial to expense, a lot of companies just send it directly into the expense system, and you don't even need to do anything. Another one is (for some reason) a lot of business travelers shy away from Uber X and only ride Uber Black - I have no idea why, after a thousand+ rides in UberX, I really don't see the additional value of Uber Black, unless maybe you are giving a customer a ride? Price is, within reason, irrelevant to business travels - company is paying for it anyways. Speaking for myself, personally - I will do almost anything to avoid having to get into a Cab in San Francisco or the Peninsula, from a experience/comfort perspective.