as per this post http://aikaforum.t3fun.com/index.php?topic=25012.15
quoting GM Infernus on this
"Diplomatic Envoy aims good to the game. I dont need to explain that. I'm talking about the thrill, politics, governance..
Again, there are 2 MAIN factors that we consider before locking a nation or activating an envoy...
1. Nation count (There will be a broader explanation below about this)
2. Nation Activity and Government.
Now for the nation count, there is such thing as PEAK TIMES. We are all not awake 24/7, of course most of us need sleep (kudos to those who dont need to, me sometimes.) And, there's such thing as TIME ZONES which affect those peak times.
We are not in control of those factors, time zones and peak times, those are players' prerogative. The envoy from what I know was opened to Alethius and Lenaria, which user count is lower than Vanov. And for Ostyrion, as I am composing this reply, they are almost equal to the user count of Feonir. About hundreds atm.
We also are not in control of those AFKers or talent farmers. If a nation has more of them, that's what they want and we do not have the right to enforce them not to do so as it is the normal gameplay system.
How do we find user count per nation? Of course we are admins and we really want to show them to you for real. BUT, we can't because that's not allowed, protocols, well.. We have a system to track user count per nation and that is accurate as yeah.
That's all. To those who will not get the point. OK then."