People were often creating private servers which kept the server number up. But now since you don't get TC in public servers anymore (due to farming), people don't bother to do so and much rather just play in the servers that are static. That means, there are less servers.
edit: Eh, I might have misunderstood something then. Whatever.
to keep this going, where _are_ the public servers where you can still gain tc ?
was playing a bit before and all i got was like 9 beginners servers, 5 intermediate and a whole bunch of private servers where people with "interesting" ideas of using their ops are hosting ....
Ahem the first 21 servers are the pre-made servers I believe. And the rest are the player created servers.