There are Airbnbs sometimes located in places where there is either limited or no hotel availability. I stayed in one once because that Airbnb was the nearest place to stay to get to the Hoh Rainforest (Olympic National Park). People also stay in Airbns to have "unique" experiences in remote locations or for a longer period of time than what would be possible in a hotel without having to need to sublease an apartment/house. I don't know why people use them for vacation when there are hotels available. The experience at a hotel is far superior.