50% of all Uber riders think a tip is built into the fare. It's not. For every $10 that a rider pays for a fare less than $4 becomes profit for the driver. A $2 cashless tip on a $10 fare would raise the Uber driver's base salary above the poverty line. Driver's complain about Uber but don't leave. The other option is to make Uber riders aware that tipping is appreciated for a job well done & Uber can rest assured that the tips will be cashless