I purposely suggested so many seals as reward because I know that, based on the current queues, if they were fewer they might not be enough to make more people play pvp, most of the hunters would probably just continue doing hunts only as they'd be much easier and quicker; if queues were on average 5 minutes long, 10 seals for first place would be more than enough.
Anyway, I understand that by giving such rewards there's always the risk of also luring trolls and leechers, but I guess there's no helping it... Playing with some casual bad players is still better than not playing at all.