Facebook game profits are big, but MMO gold farming is huge

In fact, a report (PDF link) by the Word Bank's infoDev finance program suggests that 75 percent of all virtual goods sales globally are from gold farmers. Gold farmers are folks who make money off of gathering gold in games like World of Warcraft and selling it for real world currency. The types of gold farmers range from those who do it for a wage to those who steal it directly from players' accounts to bots, or automated programs that do the in-game dirty work. Facebook games might be worth $5 billion in four years, but gold farming was worth at least $3 billion in 2009.