But after a few days the demand is not so high anymore and players stack up in negos.
yes, that's why I wrote post #8

Is it posible that the list needs a min of players? .... and have a max.¿? .... so it can allow 98%s if not enough 99''s ¿?
There should be some parameters that we miss maybe....
Yes, that's why I said about unanswered questions.
Maybe a scenario could be that a 78% is in the list cause of lack of many players and later if there are new 99% players, the 98% player will stay out.
Who knows

I suggest bigger pool for list and cross negotations through servers*
I think there are more players from our server but for some reason we can't see them.
One way to increase the pool, is to search nego players (as scouts too or market) for specific zones.
For example I 'm searching for Defenders , Def/midf, Attackers, Attack/AM ...