I checked DMD official website last night, and found some very encouraging development. DMD is not only a pure online game, but CYOU is trying to make it as a online social plateform. The most recent event is to incorporate a popular TV opera into DMD, so players can be part of the story and can try to change/influence the development of the story by playing the game. If that works, then DMD game scene can be continously expanded, which will make the game plateform atractiveness long lasting. That's just my impression, and I didn't really play the game, so may be wrong.