Not exactly. AirBnb's core business is urban partial rentals (where they started as a direct competitor to Couchsurfing). They've been expanding into the VRBO s

Not exactly. AirBnb's core business is urban partial rentals (where they started as a direct competitor to Couchsurfing). They've been expanding into the VRBO space in the last few years, but that's a closely related segment. AirBnb has very few properties in the high end price range and people who are willing and able to drop that kind of money on a rental are looking for a very different experience, from booking to the stay. I doubt very much that any AirBnb or VRBO owner is very concerned about either company making a move into luxury rentals.