You discover that it doesn't exist and you have to make last minute alternate arrangements.
Airbnb will try to help you, but if it's during a busy season, you are kinda fucked. Once my airbnb host for a 5 bedroom house cancelled last minute and airbnb was like "don't worry, we can get you alternate accomodations" and recommended me to a field that we could camp at, lol.
You'd probably get refunded by Airbnb, and they'd ultimately pay the monetary price of the scam, but yeah, trying to find a hotel or b&b with space at the last minute would be mega stressful. Worst comes to worst, you sleep in the car.
