Take a look at this.

Lots of interesting numbers reported in that article.

Smedley, 33, is the chief operating officer of Sony Online Entertainment, where he's master of the virtual boomtown known as EverQuest. Once a destination for the fringe Dungeons & Dragons crowd, the online role-playing game now has 433,000 paying customers who generate $5 million a month for the Japanese entertainment giant. Given the 40 percent gross-profit margins, and the fact that this world practically runs itself, the dragon-slaying business is looking pretty good these days.
So now we have some more definate numbers. 40% gross-profit margin on $5 million. What exactly is gross profit? Just need to pay taxes from that? Sony's makin a bunch off EQ. Way more than just breaking even.