I'm sure there are plenty of drivers who drive for Uber to supplement their income, not replace. If they already have a car, they only need to cover the additional mileage/depreciation, not pay for the entire car lease.

>they only need to cover the additional mileage/depreciation, not pay for the entire car lease.

Don't forget the extra insurance required when you are using your vehicle to transport passengers, commercially. Of course, not many people actually buy it, which is essentially insurance fraud. Don't think so? Call your insurance provider and ask their opinion.

Bear in mind that the other costs for the driver are the same - they need to pay the car lease, insurance, etc in both cases. As far as I can tell, the only difference is 250 vs 20%.