For something like this the level of organization is tiny. I added to tux, and all I need was the picture of tux. I barely needed that because I just refilled pixels people poked into him.
Does it make sense that you'd really only need about 300 people, one for every second in 5min? After that, the group can pretty much add squares constantly, one per second. Maybe that wouldn't be fast enough, but it's a good head start on offense, and I'm obvs not accounting for defense.