[ValentineC]

I think it's more because Grab (Uber's competitor in Singapore) has always had the cash option from the start (Grab introduced GrabPay — their credit card option — after) [1], and Uber was trying to match the "feature".

[1] https://vulcanpost.com/171862/grabtaxi-uber-challenge-cashle...

[pajop]

In the Philippines, Uber accepts cash. It has the options UberX, Uber Black, UberPool and UberHop (point-to-point)