@Jill0
You're correct. Airbnb has been very quietly building up a network of these "Professional Property Management Partners" in cities across the globe since at least late 2015/early 2016. The first "official" Airbnb-recommended partners surfaced in London about a year ago, with many more recently popping up worldwide. (All with similar branding, similar websites, similar marketing strategies etc)
The reality Is, Airbnb cleverly used regular hosts to establish and build up the co-hosting concept in the first instance, as they desperately wanted/needed to maintain the illusion in regulatory battles with local governments, that Airbnb is still primarily about traditional hosting and personal host-guest interactions, and locals using their hosting income to pay their bills and stay in their homes, rather than about commercial entities and foreign speculators on their site stripping city after city of long-term housing stock and driving up local rents.
Once the demand for co-hosts had been created and the co-hosting marketplace firmly established, it had always been the (long-intended) strategic plan to pull the rug out from under the regular co-hosts, without warning or explanation, and channel all that lovely co-hosting business in the direction of their own "property management partners" that they've been grooming and preparing for glory for the past 2-3 years. (An added bonus was that the addition of co-hosts on the site muddied the waters and made it much more difficult for lawmakers and policymakers to get a true breakdown of traditional versus commercial "hosting" figures in their respective jurisdictions)
Meanwhile, the regular co-hosts who did all the hard work in growing the marketplace - many of whom gave up other jobs to do so - have now outgrown their usefulness, and have been cast aside like worthless trash. Welcome to the wonderful world of Airbnb...