I doubt it would be a scam, I think it's just guests don't want to pay all the airbnb fees and taxes.. airbnb only want people to only use their platform as to only making a profit off of a host.. Airbnb is never on a " hosts" side anyways as to damage or disrespectful guests, they do nothing anyways, a cop would.. nothing wrong in my opinion to take someone for cash payment, my opinion, they're not our parents or guardians.. our homes, not theirs.. no different than if I were to get a roomy off of kajiji or something. All about airbnb making a " profit".