[icebraining]

6 minutes to drive to a customer and 6 to drive him where he wants to be.

You're assuming that each ride is independent, but that's already not the case with their Smart Routes - the driver picks up a customer, then picks up another one on the way, then drops off the first and picks up a third, etc.

The goal stated by their CEO is "perpetual rides", in which the car is never without a passenger.

[Someone]

Perpetual rides may be their goal, but I don't see how they will not get there. For example, there's no way they are going to find as many people wanting to go to sport stadiums as are wanting to get away from them, just after the end of the game, and stadiums typically are so far out of about every other destination that they cannot make a detour there with a paying passenger on board to pick up a second passenger.

That applies to a lesser extent to such things as theaters and cinemas, and even suburbs (who wants to get picked up there at 1 AM to fill the car that that theater goer took home?)

They will get below 50:50 for "at least one passenger on board", but it would surprise me if they managed to beat a 25:75 ratio.