It's not just about GNW, when your second character in their group you will see their conversation and group members tend to share guide, information about game with each others. Knowing information is the biggest advantage in this game beside money and trust me no one want to give their enemy information and share that advantage with them, that's why.
Same case with me, I keep crucial information for members within the group. I also kick all members who leak the information I gave them if I find out they're leaking it to their friends outside the group.
This helped us, a group with just a few players won against the biggest group with all spenders in it many times
So yea it's common sense if people find out a "spy" from other groups, that "spy" should be kick asap.

What about info you don't have on forum or there is no youtuber cover it yet from cn version? I'm not talking about just current game guide, I believe I already mastered the current version and most of info on forum are useless to me now. That time when I was a noob and need to looking up forum for info was over long ago, now I go and get info myself from other versions like CN server.
Knowing info will let you know which to save up or make plan to manage your resource, for example the cave key rebate. Anyone who has their hand on that info didn't spent their keys before it happen because they know key rebate is a thing. Just take a look on forum, there are many people that are active on forum but still used their keys regardless before that happened. This post was last edited by Kouka at 2017-2-25 12:16