These are all very good questions, and so far we have zero data points.
I can see there might be a case for ride sharing if it's handled like Airbnb, with a lot of communication between renter and car owner before the fact, to make sure both parties have a very clear understanding of what is expected. I'm far, far less sure that people offering their car to any random stranger who clicks on a cellphone app to rent the car, are going to be pleased with the results.
As I see it, at best you're going to be wearing out your car faster, putting more miles on it than you would otherwise, just for a short-term benefit of rental fees. Is that really going to pay off in the long term? Or with the increased cost of insurance* and maintenance, and the increased depreciation on your car, are you actually going to be losing money in the long run, while running the daily risk of your car not being available when you want it, and also the risk of the car showing up with stains and scuffs on the upholstery and/or vomit in the carpet?
One thing is certain: If I owned a new car as nice as a Tesla (either Model 3 or Model S/X), I would be very, very reluctant to rent it out to anyone. Anyone at all.
*For using your car for commercial purposes, by renting it out
Now, to those whose motive for renting it out is to proselytize EV driving, to give as many people as possible the chance to drive a compelling BEV, then more power to them! But I am rather skeptical that those choosing to rent out their car to earn income from it, are going to be happy with the results for long.
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