Do you want Free NX?

Read moar.

• Inflation: When people can buy mesos easily, the amount of in-game money increases exponentially. This means that individual mesos are worth less and prices rise. Players who earn their mesos honestly get outbid for items by players who purchase large sums of mesos with real money outside of the game. Since sellers only take the highest offer, honest players simply can’t keep up.

Meso bags do this. Even if it is bought by "Nexon or a Nexon-authorized marketing partner."