Buying Mesos

Well if Nexon can send DMCAs to fansites for making them "lose" money, they can surely send DMCAs to meso selling sites.

The thing is, since fansites aren't making money, and meso sites are, the meso sites will either close down and spring up somewhere else (brand name recognition is nil to non-existent), or if they have enough money, ignore the DMCA. Then they go to court or Nexon chickens out.

Also, many meso sites are based outside of the US, where the DMCA doesn't apply (like The Pirate Bay).