If you are defining con-runners as committee + key staff, I'd agree with you; these are visible (and generally thanked) people who put in a great deal of personal effort to make sure a convention runs smoothly. If you are defining con-runner as everyone who works for the convention in some way, be it tech, gophering or whatever, then I would have to disagree with you. It may be that I have misunderstood the rules of this award, but I'm not sure if there are many other sets of people that would qualify for it? The people who run outreach programmes maybe, or something similar to that.

I do feel there is a good case for including all UK conventions in a particular year when considering the award and not just Eastercon, but lack the personal energy to campaign for this at the moment. Maybe I will someday...