http://aionsource.com/forum/cmps_index.php?page=whatisaion
Petits quotes (non traduits, la flemme
) :
"For example, imagine a castle siege-style scenario, where one of the player factions, the Ma, is attacking the Chun faction´s castle. In the middle of this siege, the Yong may appear.
When they arrive, no-one will know what they are going to do. They may have previously helped the Ma, but that doesn´t matter; in the siege, they might betray them and help the Chun. Or they might help the Ma to siege the Chun´s castle. Or... they might try and take the castle for themselves, fighting against both the Chun and the Ma.
The important thing to realize is that the Yong are not typical NPCs. They are the third faction in the game, and they have free will, which makes them very unpredictable."
A savoir : les Chun et les Ma sont les deux classes jouables, et les Yong sont ceux controlés par l´ordi 
Autre quote :
"For instance, perhaps the Ma players on one server are generally more active in collecting minerals than the Chun players. As more Ma players dig for minerals, then they might discover a new variety of mineral. This mineral could be stronger than any mineral seen before, and could be used for the creation of various, unique items. This would be something happening on just that server.
On the other hand, what if the Chun players are more interested in hunting? They might be hunting in a location where baby dragons are appearing a lot, then suddenly find that no more baby dragons will appear - but stronger mother dragons will come out! And of course when new monster classes appear, they bring new item drops with them. There are many, many examples of how player´s behavior can trigger interesting events - all on individual servers."
