Theoretically, your are right. But there is no surplus in UberBlack, UberPop, UberX. The surplus, ride sharing, exists only in UberPool. Why? Because the sur

Theoretically, your are right. But there is no surplus in UberBlack, UberPop, UberX. The surplus, ride sharing, exists only in UberPool. Why? Because the surplus, as you argue, is: there is a driver who wants to go from A to B. I need a trip from C to D and it happens, that C and D is along the ride of A to B, or even match with A and B. That is called ride sharing. That is nothing new. This kind of business exists in Germany for years. There are also nice Apps that integrate with your navigations system, like http://flinc.org http://flinc.org But what Uber offers with Uber{Black|Pop|X} is not a ride sharing. I still want to go from C to D. But there is no driver who wants to go from A to B. There is only a driver who wants to make some money. So the driver may come from A to pick me up at C. But after D, the driver is either going back to A or will pick up another client. This no ride sharing. Without me as the client, the drive would not have taken place in the first place. So there is no surplus. That is the distinguishing element between business and ride sharing.