I've been riding the Casual Carpool for the last 6 years. Love it! The reason drivers don't care about "revenue" is that they are driving across the bridge anyway and care more about the time than money. Another way to think about it is the 30 minutes saved by picking up riders and getting into the carpool lane is payment enough. Also explains the reason why riding back to east bay is not "successful". It isn't particularly faster nor as convenient.