I couldn’t agree more with your observations on Airbnb and Uber. And I have been there with car rental companies. The one true sharing economy movement I am part of is www.homeexchange.com — I have been traveling this way for more than 15 years with 28 home exchanges with people globally. Besides the yearly member fee for the platform, no further money is exchanged, everything is founded on mutual trust. Also — perhaps it’s worth checking out GetAway — a Berlin Startup that programmed a platform for personal car sharing. The website is in German only but perhaps it is worth talking to them anyway… Greetings from Berlin!