The website KOTAKU has release a news about casual MMOGs.
The details are as below:
Lightspeed, a venture capital firm, checked out the average revenue per user for some casual, free to play MMOGs (Club Penguin, Habbo Hotel, Runescape, and Second Life), establishing that other that SL which pulls in a little over 9 dollars a month in ARPU, thanks mostly to virtual land upkeep, these sorts of casual MMOGs pull in around 1.25 dollars ARPU per month. Which, until one considers the user bases of games like Club Penguin, seems like a damn hard way to make some money:
Second Life: 9.30 dollars/mthly user/mth
Club Penguin: 1.62 dollars/mthly user/mth
Habbo: 1.30 dollars/mthly user/mth
Runescape: 0.84 dollars/mthly user/mth
Having spoken to many other MMOGs and virtual worlds on a private basis, this estimate seems to be a good gauge for what a well performing MMOG can aspire to from a free to play business model.
Left out are a number of other popular MMOGs like MapleStory; I#DY#d be curious to see firmer statistics for a wider spread of games, though the comments section does include some speculative numbers for a few other games.
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Resource: KUTAKU