> While AirBnB has received a lot negative press for facilitating the letting of would-be residential property by large-scale professional landlords, the marketing from AirBnB's side has always favoured the "local guide, personal human experience" angle, an angle CouchSurfing has always tried to cover non-commercially.

Call me cynical, but "Advertise your product for a use that your core moneymaking market doesn't do" would be a good dark pattern to avoid scrutiny/regulation.