"Uber has, however, announced a series of changes over the last few months to improve conditions for its drivers, including the introduction of in-app tipping and plans to increase some fees."

Tipping is horrible, defeats the whole point of pre-negotiating a set price for the trip thus, no requirement to have a wallet or credit card handy, nor have to interact with the app once the car has been ordered. How about raise min. fee ever so slightly and get away from the tipping idea and lowering the percentage that uber takes from the driver off the top? Tipping is bad.