SkulFuk just hangs around and makes sure stuff doesn't break and that the necessary things get done and everyone behaves. Think of him just as a top admin dude.

LesDuncan did or used to do marketing and esports stuff. (According to this anyway but it's fairly outdated) I don't really know what he does but he's still in the Ninja usergroup (hence the ingame powers) so he's either doing stuff that I or nobody else can see or he just never ended up getting removed or maybe something else, I don't know his situation.