We think systems like this, similar to the PLEX system created by CCP for EVE Online, address a lot of issues with real-money-trading and strikes a good balance between controlling the in-game economy and rewarding players for mastering the game and spending time playing and the interest of some players to increase their enjoyment of the game with real-money purchases.

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"It's very much driven by a good story and fast money and momentum trading rather than a belief among the world's institutional investors or real-money investors that the weaker yen is sustainable, " Mr. Dehn said.

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