There are info I found:
hosts who get their account shutted down:
http://www.airhostsforum.com/t/airbnb-closed-your-account-now-what/1488
a superhost, very famous in thailand and even invited to airbnb conference who had his account shutted down
https://medium.com/airbnb-superhosting/airbnb-why-did-you-terminate-my-account-an-open-letter-to-air...
The general idea is that airbnb is closing here and there some accounts/listings in order to show some numbers to the local authorities (who are against this flourishing market of Airbnb becaus it infringes Hotel's businesses).
And to do so, they start closing accounts/listings to the hosts who got more listings/revenues. It's a small sacrifice in Airbnb's overall system, paid to avoid finishing like Uber (having authorities fully against them).
Our problem in this case is that we hosts are the sacrificial lamb.
There is no solution to this problem. Nor the will from Airbnb to give one,as it is their own purpose to shut down these accounts.
For people like me who created an entire business on it and spent years in a raising quality of services provided it's a killing news.
HOW TO MITIGATE THE RISK THAT IT HAPPENS:
Multiply your airbnb accounts and spread all of your listings between them
You can also automatically sync calendars using import/export functionalities.
List yourself on other platforms too (flipkey, wimdu, vrbo, etc.) to mitigate this risk.
WHAT TO DO IF YOU'VE BEEN HITTEN
Nothing, at the moment. Me, personally am going to create other accounts and to create new listings (that therefore will not be disactived soon) under the first account, so I hope I will mantain my 1,500+ 5 stars reviews.
And I will put in action all the "mitigate" actions, by the way.
Bad news, guys.