If your group has competition, aka its not so stacked that facerolls every other group in xgnw then boosting top bp players to get their super rares (hashi) is actually a legit strategy as most of the times those 9 strongest people carry your group to victory. This could be the reason. Also don't forget that people responsible for tactics for gnw usually spend way more of their personal time to make sure group wins. Not to mention ammount of effort and work needed to establish a stable and player-friendly group up till this point. Because of that it's leader's priviledge to decide how packs are distributed. However person on top is still a human, so trying to talk to them and give them solid arguments (backed up by other groupmates) instead of plain complains might work.