Well this has potential...
"Clearing a maze will yield two types of rewards: treasure chests and M.M.M.-specific points. Within the chests, players can expect to find any of a variety of equipment and M.M.M.-related items. Also, amassing M.M.M. points will allow players to purchase other M.M.M. pieces. There are even designs to introduce gear which can only be obtained by braving the mazes!"
From the english version of the dev blog.
The First Scenario! (FINAL FANTASY XI クリエイターズボイス)
Probably not extremely good gear though lol.
XI Wiki


