I don't, actually. If the financial industry has taught us one thing, it's that you can insure anything.
Let's assume that this is a very rare occurrence and that the total cost of making this right (say, tops $100k?) can be amortized over the profit being generated. I have a hard time understanding how it'd be rocket surgery to get something in place to handle these cases, especially just after a $112 million cash infusion.
Everyone keeps bringing up fraud, but fraud is nothing new to insurance and there are centuries of practices established in that industry for dealing with such – i.e. it will happen, it can be minimized by establishing premiums, requiring police reports, and, again, amortizing the cost of fraud over the spread of valid commerce.
[Edit replying to parent's #2 edit]
Sure, this one needs to be out of pocket. Actually, it'd probably be easier for them to insure now since there's a data point for how often this will happen per x number of rentals. Handling one of these out of pocket can't be a biggie for a company with several orders of magnitude more cash in the bank. And with a multi-billion dollar valuation, there will be institutional insurers that will be willing to build up a risk profile for them and work out a policy to handle these these things in the future.