Of course, after hailing and waiting, and then taking the ride, you had to pay for the taxi. And frequently the credit card machine was "broken" and you had to argue with the driver about not having any cash. In a time when many individuals have moved away from cash almost entirely, that was a huge source of friction, and Uber and Lyft largely solved with in-app credit card payments. Because you had to have the app to hail a ride, payment for individual rides after entering a card for the first one is frictionless for the user.