That seems to make sense then... the instant gratification of seeing the polls in progress after voting, without the ability to change your vote, would still allow people to "shill" for one character or another.
For instance, if I vote for Green Lantern instead of Vulcan, that's my vote. If later on, someone brings up a point that makes me want to change my vote, I can just campaign for Vulcan on the board, even though my vote has already been tallied for GL.
I could dig that.