Yeah graal is single minded for the most part. No point in trying to change their mind in adding a trade system. Guns aren't the only things people will trade, what about rares? I'm pretty sure people can just jack up the prices and force other players to pay more for items forcing players to pay more and buy more packs. They also have auctions which they already make some money off of people buying gralat packs in hopes of winning. They could also make money off of EC items too which they already make close to no money off of.