Would need to evaluate the one-time charges to determine if they actually would be ongoing. Simply having some one-time charges doesn't mean they will necessarily be perpetual.
In fact, the vast majority of riders have a preferred option even without the frequent rider incentives. This is even starker on the driver side.
The advent of pooling and continuing improvement absolutely have had a significant impact on the economics.
Uber has delivered various efficiency improvements including map-based routing and pricing, pooling. Lyft has "Shared Savers" that trade time/walking for lower fares and more efficient pickups/drop-ffs.
In fact, Uber & Lyft are frequently more expensive than taxis because of surge pricing and superior product.
Uber & Lyft are in the best position to take advantage of robo-drivers.