I personally don't think they are win trading. I am actually in the Linkshell these guys are in and its used to set up these games and they mostly aim to gather people up in order to play light party Feast. They actually didn't play one day because they couldn't find a healer to play. Doesn't exactly sound like win trader behavior to me since if they were win trading they could get any random person to fill the role.

Here is the basic situation on Primal as far as Light Party goes. Ques just don't happen, and when they do happen it is through people setting them up before hand and agreeing to play. No one is going to sit in que forever hoping someone else ques. Pretty much everyone you see on the leader board now is a product of set up games. I have seen pure Leviathan server people do this and in the end they were not called out for win trading.

Now it may seem weird that this one guy came out to win pretty much all games but it really isn't in the context of Exodus as a server. You can imagine if I ended up taking their invitation to play that I would probably end up winning a majority of the games. Why? Imagine the following scenario(Ranks are in context of solo que skill):

Team 1: Bronze Bronze Bronze Silver

vs

Team 2: Bronze Bronze Bronze Platinum(Me)

In that scenario I would end up winning pretty much all the time in the same way as the current rank 1 did.

In the end, everyone on Primal knows the only way to get games is to set them up. What they are doing on Exodus is no different in that context and unless I somehow missed the dastardly colluding, I don't think they are win trading.