Those who defeat Ifrit in a party formed exclusively of members from their own Grand Company will earn greater rewards.
This concerns me because right now, like it or not, everyone is in Ul'dah ul'dah ul'dah.
Anyone with levels or aspirations to fight this guy will know that parties will be formed with this in mind and feel forced to join U'dah. What other way can there be if you want to significantly increase your odds?

Maybe people won't care after all, and i hope not, but it worries me.