If you know that the alternative costs twice as much, and you doubt that the driver offering a ride for cheap can actually support his family, you have a choice.
If you are worried someone else might take a chunk of the expensive ride, or if you prefer the cheap ride anyway, you could always tip. US is the land of tipping, right? But then again, that might feel weird since the payment is centralized... Funny, that.
If you are worried someone else might take a chunk of the expensive ride, or if you prefer the cheap ride anyway, you could always tip. US is the land of tipping, right? But then again, that might feel weird since the payment is centralized... Funny, that.