I use Uber pass fairly regular on my commute to work. One other minor unrelated thing I have seen is if the commute is within < 1-2 miles the drive ends up giving you a bad rating (not that ratings matter to me) but uber has no way to screen this fake rating. I made sure I was at the pick up point well before the car arrived, and minded my own business throughout the ride.

On talking to couple of drivers on a few occasions they confessed that they do this to filter out folks asking for lower mile rides!!

edit: This is obviously not in high uber/lyft density zone like a downtown SF where one can assume most of the rides endup being in the 2 mile radius.