This could be the first "pimp your car out" service I'd consider using. If the manufacturer were behind it, on a leased car, and absolutely guaranteed any damage would be restored, plus compensated me enough to cover depreciation/lease mileage fee/etc., the only inconvenience would be "make sure your car is totally empty when you leave it parked".

I tend to buy/keep cars ~forever, so it wouldn't work as well for me now, but if I could lease ~3-5 BMWs for ~20-30 people to share (at a remote company office or something which has a lot of people cycling through, and where some cars are needed), and then add them to a fleet pool otherwise, I'd be in. That's somewhere between Zipcar, Uber, and leased company cars.

Managing maintenance, cleaning, insurance, repairs, etc. for them for me would be great, too.