Most of the people on that list haven't been on debug in many many months. Some even said they quit (Novo).
Oh and if you notice, a bunch of those names aren't even part of kingdoms (like the Admin accounts). They just have RC to talk to Stefan, globals, etc.
EDIT:
I would say this is a little more accurate (not completely sure, just going off who I see on debug, kingdom leaders and some /staffactivity lists...don't know which of these names actually do work though):
Kingdoms Directly: (No idea about here)
Kingdoms Debug:
dNeonb,Stephen,NicoX,DraxxTeazok,ReBorn_Spirit,Got hika,Obs311,zokemon,theunknown,Stromstedt,godofwar ares,Ravenblade1979,LadyShadowZero,Cruchot,cyan3