Internet security researchers in Italy reported that marketers who spam Facebook can make $200 Million per year. The spammers posts links on fake fan pages that takes the user to third-party sites where the website owners earn money on ad impressions, affiliate links and ad clicks. Around 9 percent of the websites uses ads provided by the Google Adsense program.
The marketers first create fan pages and attract real Facebook users to “like” the page. Once they had a page with likes in the thousands, they would then begin to sell links to third parties and the spam begins ending up in users newsfeeds.
According to the security researchers, a spam link for a page that has around 30,000 fans costs on average $13. For a spam link on a page with around 100,000 fans, the price of place a spam link is $58 on average.
Source: Charles Arthur, “Facebook spammers make $200m just posting links, researchers say,” Guardian, August 28, 2013.