Last year, Facebook marked a new milestone in its nine-year history. It lost users. While the network did pass the 1 billion monthly active user threshold globally in 2012, Facebook also lost 1.4 million U.S. monthly active users late last year, a small but symbolic decline. Nor was it the only network experiencing a slowdown. After years of double-digit expansion, ...

Last year, Facebook marked a new milestone in its nine-year history. It lost users. While the network did pass the 1 billion monthly active user threshold globally in 2012, Facebook also lost 1.4 million U.S. monthly active users late last year, a small but symbolic decline. Nor was it the only network experiencing a slowdown. After years of double-digit expansion, ...