Support WBUROnline Marketers Take Note Of Brains Wired For RewardsPlay05:39Download AudioSteve HennJuly 24, 2013 SharePopular online games like FarmVille use powerful reward systems to get players to spend real-world money on virtual items. (Zynga/AP)
Popular online games like FarmVille use powerful reward systems to get players to spend real-world money on virtual items. (Zynga/AP)