Yeah I imagine Turo is exploding. When I traveled this summer my options for a 5 day rental were $2,200 from all the rental car companies, or $375 from Turo.
How do they deal with insurance? I'm not sure I'd feel very comfortable trusting a random stranger to use my car for 5 days, unless I was sure I'd be paid out in full (or more) if they were to damage or total the vehicle.
Most companies like Airbnb, Turo, Boatsetter (airbnb for boats) offer some insurance they negotiate with an underwriter like Geico. Getting this sort of insurance individually is much more costly or next to impossible, which is why we don't see people short-term renting expensive assets to each other on Craigslist. I imagine negotiating the ability to dole out these sorts of policies at scale with Lloyd's of London or GEICO is fairly arduous, but it seems like one of more key pieces for these companies to successfully get off the ground to me.