system
A chat on subreddit /r/wallstreetbets
human
In the US. Most other countries you pay the price you see on the listing. The early days of Air Bnb were amazing, but all the state mandated added fees and taxes are clearly in place to benefit hotels.
gpt
It isn't state mandated fees.

It's greed, and the natural conclusion to a service filling a vacuum. 

What was once a nice way to generate a little revenue from unused property quickly became a tool to generate profits from buildings tailor built for the service.