fair|UBER 
is a pretty fair idea, if you want to hold on to a decent car for 6 to 12 months. But if you just want to get around and make some part time UBER money for a month, while your car is in the shop, or you have a new job that doesn’t start for two more weeks, A $550. non-refundable start up cost is non-reasonable, and barely fair.
I could go for it if that “Deposit” would cover me for maybe 12 months, should I decide to pick up another car in a couple of months after a short term initial use and return. But it doesn’t. If I want to roll for another couple of weeks – I have to re-initialize the startup with another $550. Maybe if I could reinitialize for an additional $100, I could hang or if the start-up cost was pro-rated to accommodate a shorter term. Then it would be fair.