[Thirty and Chestnut] What's free is often the most expensive.

From the earliest Shanda's "Legend II" to now, almost all online games have become free. However, they sell the props used to pass levels in the game. The violence of this kind of value-added service is astonishing. A game enthusiast mentioned that this game made him spend several times more money per month than before. This behavior, which was once considered shameful among peers, is now advocated by these online game providers...