I think the issue there is that car-hailing networks lack exclusivity and have limited lock-in. This suggests a race to the bottom is inevitable: customers want

I think the issue there is that car-hailing networks lack exclusivity and have limited lock-in. This suggests a race to the bottom is inevitable: customers want faster rides and lower prices; drivers want more customers (either larger networks or fewer drivers) and high rates; the network wants to share as little of the price as possible with the driver. In other words, the network is in the position of having to attract both customers and drivers, and price/reimbursement are the primary tools. Eventually, this should drive the margin for car-hailing networks to a stable low point, because if the price is too high customers will go elsewhere, and if the driver share is too low drivers will go elsewhere. Only by building its own fleet or by maintaining an artificial lockin of some sort (and I would classify brand/marketing dominance as being an artificial method of maintaining market power) can an intermediary network manage any level of bargaining power.