That sounds like bizarre insurance that won't let you ever take a vacation.
I have spent quite a lot of time and money preparing to AirBnB my home in Sydney but have now met the elephant in the room - INSURANCE! I suspect that it is something that either doesn't occur to people or they just keep their fingers crossed. My house's replacement value alone is in excess of the AirBnB 'policy' and even a 1 night rental would invalidate my home and contents policy for all time.
Insurance needs to be checked very carefully and cheap policies are cheap for a reason. It is in AirBnb
B's interest to lull hosts into a false sense of security with their 'insurance' offerings. Caveat emptor!
My decision has been made today - the risk albeit small is just not worth losing my home over!