This is the business model: get more money out of customers (because no real alternative) and the drivers (because zero negotiating power). Not to mention that they actually got to that position by literally operating at a loss for over a decade (because venture money). Textbook anti-competitive practices.
However, the idea itself (that is having an app to order taxi) is spectacular. It also something a high-school kid could make in a month in his garage. The actual strength of the business model is the network effects and the anti-competitive practices, not the app or anything having to do with service quality.