They should charge a service fee to the rider, for however much they need to be profitable; and let the drivers charge whatever they want (baseline auction). N

They should charge a service fee to the rider, for however much they need to be profitable; and let the drivers charge whatever they want (baseline auction). Now the customer knows how much they are paying to whom. Imho, Taking a cut of earnings is borderline unethical for a automated services, whether its lyft, upwork, or patreon. Charge a fee, know your numbers, give both sides of your service's users confidence in the service's stability.