My dust2 server was ranked 165th in the world yesterday when i woke up its not in the gametracker data base anymore.. also my other servers,. What the hell happened?

Servers can be deleted in the following cases:

1. Server was down for too long
2. Server owner/admin manually removed it
3. Server was banned from the site
4. Server was deleted due to minor abuse (eg. changing the flag to somewhere nowhere near the actual physical location of the server)