Any idea how Airbnb actually implements the craigslist posting? Yes it's auto submission, but with craigslist's new security measures and login requirements, t

Any idea how Airbnb actually implements the craigslist posting? Yes it's auto submission, but with craigslist's new security measures and login requirements, that looks really hard to do purely from a URL standpoint. I'm almost wondering if there is some private API they are using or if they have some sort of partnership going on. Any ideas?