A "nights hosted" counter will be added to Airbnb users' profiles to help track the number of nights they've rented out their homes.
The rental cap will only apply to Paris' first four districts (or "arrondissements") unless the host has authorisation to rent a property for longer. This means it could be harder to find an Airbnb next door to popular tourist spots such as the Louvre, Notre-Dame cathedral and the Marais. (The Eiffel Tower, in the seventh arrondissement, is safe for now.)
Last December Airbnb limited the number of days that users could rent out their properties per year in London and Amsterdam to 90 and 60 days respectively. Meanwhile property owners in San Francisco have been limited to 60 days per year.
I dont' think that info is correct for San Francisco.
This makes it sound like any given host could only rent 120 nights total for ALL their listings, since the #nights is counted per host profile, not per listing. That wouldn't work if a host is a property manager who runs multiple listings for others.