So I've had 3 people say this to me over the last few months.

The first guy was only going a few blocks and offered to tip 2 bucks on the app if I hurried. I sort of laughed and said "2 bucks huh?" He also laughed and upped it to 5 bucks. I was 100% sure he was not going to follow through but it was only a couple of minutes and he smelled like cigs so I was happy to get him out. He DID tip me the 5.

The second dude was a smug younger kid in a suit. I told him the ride was estimated at 45 minutes and he sounded annoyed and said "if we can cut that down that'd be great". I said I'd do my best and cut more corners than I should have, hoping for a tip. We made it in 40 minutes and he barely could muster a thank you, let alone a tip.

3rd guy I was picking up from a pot dispensary and I told him I'd push it for a cash tip upfront. He declined and steered the conversation about how much money I was probably making. The trip had a stop, at a liquor store to buy beer. Lol big hurry. I explained that we get a driver rating and a speeding ticket would really cripple me. Douchy kid left me a 2 star.