Wait a minute. So, you mean that only the occupying guild will get to be able to purchase those rewards? If that's so, how about the union who helped them? That would mean there won't be any unions left, people will join the occupying guild, others will simply leave the server. You should make an option that only people from the same union or guild masters should be able to buy. but in this case...they could very easy sell those rewards for in game gold. for instance the skill point scroll which cost 5mil and a few GP can be sold so easly on the market...
i dont get it, this fortress reward system only benefits the main guild which is extremely one sided and very bad.