I still don't understand why anyone would literally rent a car for $500/month for three years and be left with nothing, and just have to give the car back at the end of the rental period???????
Cars are generally depreciating assets, so regardless of the path you take you're losing some amount of money. A monthly lease payment like this may work if somebody can't afford to buy the car outright or pay a more expensive rental that includes an asset (car) at the end. Or if they prefer a lower monthly payment so they can invest a bit of their money instead of tying it up straight away. There are definitely reasons, which is why people do it.