Maybe because AirBnB found success in commercial property rental, not renting out your couch to someone, the original pitch. But I still don't think it's clear why AirBnB succeeded.
(Although parent didn't mention AirBnB?)
(Although parent didn't mention AirBnB?)
In retrospect AirBnB could have been more accurately pitched as a better VRBO but there still isn't an obvious reason why that would have been a good investment.