Why they push for five stars: apparently you get fired if your star rating falls below 4.6 or 4.7 (can't remember which.)
Source: Uber drivers, so biased, but have you ever seen a driver with a 4.5 rating?
Source: Uber drivers, so biased, but have you ever seen a driver with a 4.5 rating?
As an anecdote, the one time I left a 1-star review, the next day I had a 20-min wait to get a car. Not sure if it was bad luck or I was getting penalized for leaving a bad review...