I am led to believe that the turnover for Uber, Lyft, etc. is pretty high. I think a lot of people, after doing it for a few months, realize that after the cost of burning up their car is taken into account it's not making them much.

So, why don't they choose not to offer their services to Uber? Well, I think they mostly do, eventually.

Once VC money is no longer subsidizing rideshare businesses, I'm not convinced that they will stay in existence in any form whatsoever.