As Facebook’s popularity grows so does the number of third-party applications (called apps for short) that people can add to their profile.  Some Facebook revenue-generating apps let sellers advertise their items to Facebook friends and other people who use the application.  These types of buying and selling apps tend to be used less frequently as many people don’t want to sell items to Facebook friends.

Apps that help sellers connect with buyers from outside their own friend list continue to fuel money-making opportunities on Facebook.  Also, if you don’t have your own items to sell, you can still make money on Facebook using third-party apps to generate commission-based sales via referral programs.

Link: http://www.ecommerce-guide.com/solutions/advertising/article.php/3813226

Wall Street Journal Article: http://online.wsj.com/article/SB123007984542431845.html