EASTER EGG ALERT! Go on http://www.teamfortress.com/mvm/mercs/ then when you see the grenade launcher on the bar station, click on it and then it will appear this:
Mr.Green TF2 100% populated = Make 2fort 24/7 server. Nuff said. Oh and about the payload server, I can only say that add a automatic kick for people who are afk for more than 3 minutes, no more ideas from me.