This year at the Wtm tourism fair in London we heard some news about this topic.
Some channel managers have been using Airbnb using scraping technology. This technical word means that there is a machine doing on the site what you usually do by hand.
A couple of channel managers started to work using Airbnb API. API means that they are doing this properly using an interface engineered to do those updates dynamically.
Unfortunately Airbnb it's not promoting this very much and ,as other otas, prefers that their community uses directly the website.
The engagement they get with the house owners coming on the host section of airbnb.com, it's much higher than a machine doing automatic updates continuously.
In my professional opinion then:
For channel managers looking for info here or promoting their products , this is an overview of the situation. To get connected to Airbnb nowadays you may want to use their APIs.
For hosts wanting to use a channel manager (or PMS), it's better to get one connected via APIs (the scraping technology it's nothing guarantee or official) and remember that in terms of engagement it's always better to use the site.
@osviweb