Honestly I don't know if you guy have tried to do this with one of your servers but I believe a warcraft server would be a great addition or even replacement for a current "non running server". And by non running I mean completely empty. Such as one of the following:
http://www.gametracker.com/server_info/ ... .20:27015/
http://www.gametracker.com/server_info/ ... .19:27016/

I mean if one of these were to be replaced by warcraft server you would have a little bit of income I would assume if you put in a donators option for classes and limit that specific server to sr. admin capabilities so you don't have lower admins giving free levels people would buy the donators option or at one point in time ask for an option to buy admin. That and if this server were to be implemented you'd give someone a goal to achieve instead of just nonchalantly playing monotonous maps over and over again to gain nothing but a rank that means diddly squat.

So in short. Please consider replacing a run down server with a warcraft server. If you need me to look for a good one feel free to ask I just really would like to see one in this community. Thank you for your time and patronage.