[dnautics]

presumably the driver meant 'cash tips' because the app very much allows tipping, although it's also possible the driver was not entirely knowledgeable of the process.

It's more important among lyft drivers to not accept cash tips because it's a safety issue; as a community, accepting cash tips can lead to danger if pink mustaches become a target for crime. Usually I refuse cash tips and relent only if they insist (this mostly happens with service industry clients).

In San Diego, there is a driver that donates 50% of tips to charities; she has a blog where she posts her tallied earnings for transparency on the process.

[jonknee]

I've used Uber quite a bit and never seen how I could tip. Apparently that option is only available on uberTAXI:

http://support.uber.com/hc/en-us/articles/202290128-Do-I-hav...

[twoodfin]

UberX (the subject of the article) deliberately does not support tipping, and drivers are instructed not to accept tips. There's an automatic tip on rides booked through "Taxi" requests on Uber, but that's not the same thing.