Asiasoft Starts Action Against Private Servers (AAPS) Campaign

Pservers never redistributed the .wz files.

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No, i'm not sure how many times I can respond to people who seem unable to read entire posts.

contains art, music/sound effects,
Private servers use the art and music of maplestory in order to run a version of, you know, maplestory, which is infriging on the rights to the i.p at the very least.

choose who can distribute it, and the rights to choose who can make copies of it for distribution.

Now, like I said earlier.

Distribution doesn't refer JUST to the client, it refers to the right to run a version of maplestory in a specific region, Which are given to Nexon, Asiasoft , Shanda Corp. , Gamania and Level up games! for various regions.

Only the companies with the permission (probably from wizet) to run a server for any given region are allowed by law to do so.