article on new Paris Airbnb arrangement

Seems to be only partially related to the discussions on this forum on the topic.
The Century 21 partnership is solely for those subletting an apartment.
Which was before illegal ; this is a way to make subletting legal.

The issue for this forum and travelers in general are the registering of places as rental properties or lack there of.
This extra bit for subletting doesn't affect that.

The above is indeed interesting. This seems to apply to sublets by the present tenant which have been super illegal to date. Given the wiliness of airbnb and its ability to move faster than the City of Paris, this might provide another inroad into the rental market by skipping registration and sweetening the deal for the apartment owner. Many are still wondering what happened to the court case Paris vs. Airbnb supposed to be heard on June 14.

a link to one article

https://www.engadget.com/2018/06/26/airbnb-strengthens-paris-presence-thanks-to-century-21/

Under the new agreement, a Parisian renter keeps 70 percent of the guest's fee for staying, with 23 percent going to the landlord and the remaining seven percent heading to Century 21. (Airbnb retains its traditional service charge on top of the fee.) The owner must give permission for the tenant to rent out their apartment, and they can only sublet it for 120 days out of the year, a persisting restriction that authorities enacted late last year.
Per a press release, the arrangement only applies to Parisian buildings managed by the real estate company in the city's first through fourth arrondissements (administrative districts), at least for now. If it's successful, the model could extend to other French areas.

All this seems to do is offer a way for the landlord to get a cut of the rental amount that his or her tenant is getting from AirBnb. Why can't a tenant and a landlord just agree that the tenant can use AirBnb and bypass Century 21 and keep the 7% that Century 21 would get. Sublets without the landlord's permission are generally always illegal. If you think your landlord will agree to the deal, just ask him or her directly. Why add a third party so both of you can lose that 7% that Century 21 will get for basically brokering a conversation between two people who already have direct access to each other?

I don't see anything here that fundamentally changes current law and practice in reference to vacation rentals in Paris. There are only two legal categories, commercial vacation apartment rentals of which there are about 150 in all of Paris or owner/occupants renting their primary residence for a period not to exceed 120 days annually. This might clarify the relationship of renter/occupants subletting their primary residences but in these cases, the owner was always required to OK any subletting.

The core issue requiring that vacations rentals, other than commercial apartments described above, be limited to residents subletting their homes is unchanged. Investment apartments or vacation apartments rented short term remains illegal in Paris.