AirBnB's best-case "ideal" setup has always struck me as just "CouchSurfing[0] but monetised". 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.
So in my mind it's a comprehensively bankrupt proposition from either side of the spectrum. It's worse than a hotel (no service), worse than traditional self-catering tourist apartments (more expensive), worse than a long-term let (a LOT more expensive) and infinitely worse than the social, warm-fuzzy personal experience of CouchSurfing (free).