Hundreds of trips on Uber, in Australia -- There is no tip culture here. Out of those hundreds, I've had two ask for positive ratings, absolutely none ask for a tip.
With drivers who have seemed friendly enough I've tried to politely and diplomatically inquire about how fair they feel the system is. Several ex-taxi drivers have told me it is better than driving for an official taxi company in every way, including pay. (Note that taxi drivers are never tipped either.)
I have been surprised by the number of people who have been driving for Uber as a bit of cash on the side, and not as a primary income -- all of them have told me it's "worth it" except for learning a lesson early on not to drive late at night and pick up drunks, as the chances of having to clean up after an extremely messy fare is too high.
With drivers who have seemed friendly enough I've tried to politely and diplomatically inquire about how fair they feel the system is. Several ex-taxi drivers have told me it is better than driving for an official taxi company in every way, including pay. (Note that taxi drivers are never tipped either.)
I have been surprised by the number of people who have been driving for Uber as a bit of cash on the side, and not as a primary income -- all of them have told me it's "worth it" except for learning a lesson early on not to drive late at night and pick up drunks, as the chances of having to clean up after an extremely messy fare is too high.