As with WoW, Ultima Online and various other MMO's, unauthorized servers tend to be written from scratch using an analysis of incoming and outgoing client/serve

As with WoW, Ultima Online and various other MMO's, unauthorized servers tend to be written from scratch using an analysis of incoming and outgoing client/server traffic. Nobody would expect Square Enix to release their server software, just simply to disable the DRM so that others can play the game and attempt to write their own server software if they choose.