Ob,
There are rules on many of the forums and public servers about advertising your own server, as well as recruiting players openly. The easiest way to fill up our server is to play in it. If you play in it they will come. I know it is kinda like field of dreams, but every time I am in there fuckin around someone always joins. If I stay long enough more people join. The main reason for our server is to play competition matches. It is listed on the server list, so it is kind of advetised anyway. People will join the server becuase it is a quality server and they will come back again and again. So enjoy the server and play in it...the people will come eventually.