WOW! This must've taken a monumental amount of effort, thought, and engineering. Why else did it take so long to add tipping? Bravo, Uber. Still goes to show a

WOW! This must've taken a monumental amount of effort, thought, and engineering. Why else did it take so long to add tipping? Bravo, Uber. Still goes to show a massive startup can still innovate. -slow clap-