So it is not designed to be something where the driver will make a living, but really just as a way for a driver to get some company, maybe take advantage of the HOV lanes, and it gets some cars off of the road to reduce congestion.
This has impacts to the sort of insurance drivers will need to get, since it's really no different from traditional car pooling. I would not be surprised if, over time, the system tries to pair people who have previously shared rides together for subsequent trips (unless either party rates the other as, "would rather not share a ride with this person"). Knowing that you are sharing the ride with the same person that you normally share your car with would make for a much better user experience, since people are, after all, social creatures.