Its pretty much an end to the meso cap.
Its an NPC code that allows people to trade in monmey for these Sacks.
The sacks can be returned to the NPC and get his/her money back.
LOL: New maple currency.............
Heres the link:
http://forum.ragezone.com/f427/release-meso-bank-npc-updated-v2-5-a-455688/