They most certainly did. As expensive as that software is, it’s very little when amortized over the rides. It eliminates the overhead of finding a location and transmitting the info, and delivers higher value in that it gives real time data about where the car is, and lets you pay more conveniently.

Also: while the drivers have physically taken over maintenance, Uber can’t push the economic cost on to them, because they have to pay enough that drivers want to continue to work even given those costs. If anything, maintenance is cheaper when handled by a big org.

To the extent they realize a savings, it’s because they’re using the spare hours of existing vehicles and don’t have to take on all the dead ours they’d have from owning the cars not because they’re getting maintenance free in any meaningful sense.