Uber drivers are allowed to put up signs soliciting tips in some regions as they won a couple lawsuits.
I choose to tip drivers when they provide extra services or goods. If a driver gives me a bottle of water or lifts heavy luggage for me, I'll sometimes give him some money.
I choose to tip drivers when they provide extra services or goods. If a driver gives me a bottle of water or lifts heavy luggage for me, I'll sometimes give him some money.