Guest only needs one night but books two nights and stays the first night. Next day he/she calls Airbnb and complains about something- cleanliness, face mask, sanitation, host was less than 6 feet away from them, whatever. In reality it does not matter what the complaint is because Airbnb has promised a full refund to the guest in the event a host does not follow the protocol that Airbnb has mandated upon hosts and we all know that Airbnb sides with guests when it is a "he said/he said" situation. Guest stayed for free, host loses money. Thank you Airbnb.
"All hosts and guests are required to follow the COVID-19 safety practices outlined above, as applicable. If you're a guest, you will not be eligible for a refund if your host cancels your reservation because you did not comply with these practices. Similarly, if you're a host, you will not be eligible for a payout if a guest cancels their stay because you did not comply with these practices."
https://www.airbnb.com/help/article/2839/what-are-the-health-and-safety-requirements-for-airbnb-stay...