It’s an inside half-truth that many friends of Mark Zuckerberg have told me over the years: Facebook knows when a relationship is about to end. My response was to always ask more questions as it actually sounded like a legitimate possibility. In David Kirkpatrick’s soon to be released book, “The Facebook Effect“, Kirkpatrick confirms that relationship patterns were something that Mark Zuckerberg often toyed with.
In the book, Kirkpatrick writes:
As the service’s engineers built more and more tools that could uncover such insights, Zuckerberg sometimes amused himself by conducting experiments.