Possibly to save money using "UberPOOL" or whatever it's currently called. While regular uber ("UberX"?) is around the same or more than a yellow cab, UberPOOL

Possibly to save money using "UberPOOL" or whatever it's currently called. While regular uber ("UberX"?) is around the same or more than a yellow cab, UberPOOL is sometimes cheaper than a yellow cab