Facebook's (FB +0.6%) saw its U.S. unique visitors fall by roughly 700K M/M in May to 158M,...

|About: Facebook (FB)|By:, SA News Editor

Facebook's (FB +0.6%) saw its U.S. unique visitors fall by roughly 700K M/M in May to 158M, comScore estimates. The decline, which follows a modest drop in April, is the latest evidence Facebook's domestic usage is near a saturation point, though international usage (less valuable on average) continues to grow rapidly. Separately, Argus is joining Evercore in starting coverage with a Hold, and expressing concerns about mobile monetization.