Quote Originally Posted by Omegakiyohime View Post
I think it has more to do with keeping the item rare since it is being awarded through the Moogle delivery system. The Moogle system delivers the items to all characters on the account, as such for the brief period, gold dyes will be abundant since players with full subscriptions can pretty much just keep creating/deleting characters and trading their dyed items through a friend. Hence, that period can't be extended for too long.
Don't you have to do a quest to be able to dye your gear though?