Dive summary:

• Anonymous sources allege that Facebook has been giving preferential treatment to some marketers for access to extensive user information.
• Use of this information could help marketers know where to advertise to reach people interested in its product.
• This tool would allow companies to harness valuable social consumer data.

From the article:

“If you could see what other pages your fans have liked, you could make your posts more engaging by writing about those other pages. It's also an easy way to identify potential sponsorship or Facebook co-promotion opportunities," (Facebook analytics company PageLever employee Jeff) Widman said. "If you're trying to grow your fan base, you can run Facebook ads at people who are not yet fans of your page, but already fans of related pages. We’ve had multiple customers request such a feature.”