As you can see from Laby's server meter, the online count for the different servers is very different. When there was still an Olympiad on every server (now they have only one World Olympiad for all servers together) you could observe the same phenomenon. The servers you see on Laby's link are Classic servers. The 5000 or 6000 players for Talking Island are what in the live version Sieghardt and Lionel have, while Nevit, Kara, Tersi, Bremnon, Bartz and Kain are closer to the 2000 mark, with Devianne somewhere in between. When you click on the server name in the top left corner here, you will find a list of all the servers:
http://lineage2.plaync.com/gameinfo/castle/index
So let's say that on average we have about 3000 characters per server around midnight local time. With 9 servers in Korea, this would make 25,000 ~ 30,000 characters over there, which probably corresponds to around 10,000 ~ 20,000 actual players.
In Japan there are 12 servers:
http://www.ncsoft.jp/lineage2/serverState/siegeWarfare/index?serverId=12
By the same calculation method we would arive at around 35,000 ~ 40,000 characters, i.e. around 15,000 ~ 25,000 players.
China recently had a big server merge, and there are now only 4 servers left:
http://tiantang2.qq.com/webplat/info/news_version3/602/603/932/933/m708/201305/205184.shtml
Those are relatively crowded; let's say 5000 characters per server, makes 20,000 characters overall. Since dual boxing is not really done in China, this would probably make 10,000 ~ 15,000 players.
The server meter for the Russian servers is somewhat unhygienic, so I won't link it here, but they have 5 servers, also with around 3000 players online late at night. That makes 15,000 characters, i.e. maybe 5000 ~ 10,000 players.
Ok that`s very shocking to be honest when the L2 flagship territories are having such critically low active players.
The last 2 - China and EU territories are bringing only a fraction of the due to the royalties.
By the looks of it how the Servers of Lineage 2 are being managed - you could even state the fact that they don`t oficially belong to NCWest as you enter Lineage 2 directly through
http://www.lineage2.com/en/ (0 statement that it belongs to NCWest) except if you locate
http://us.ncsoft.com/en/
The scary fact is that Japan and Taiwan together are not even beating the Royalties. according to :
http://global.ncsoft.com/global/ir/quarterly.aspx
Shame can`t nowhere locate the real NCWest revenue generated split for Lineage 2.
The biggest problem is to understand, when the new players in NCKorea are like flowers who are having the growth conditions o a botanic garden( all kinds of promos/discounts/PC Cafe points/Merchandise etc) compared to NCWest new players which need to break through concrete to get a massive amount of saliva...
My bet is that if NCKorea and NCJapan would get hit in the same fashion as NCWest thier servers would be already closed withing first year...