I heard anecdotally that drivers with ratings below 4.6 have their Uber driver accounts shutdown.
In this instance, how would the rating work for drivers in an UberPool? Does each person's vote count for only 1/n, or is each one a full vote? If it's full votes for all riders in a single UberPool ride, all it probably takes are a couple of mediocre UberPool experiences and the driver is selected out of the driving pool.