This has been called "pulling a Myspace", back from when Myspace lost to Facebook. The sequence: - Competition appears, usage decreases, revenue declines somew

This has been called "pulling a Myspace", back from when Myspace lost to Facebook. The sequence: - Competition appears, usage decreases, revenue declines somewhat. - Ad density is increased to increase revenue. - Usage decreases further as users are annoyed by excessive ads. - Ad density is increased even further. - Death spiral. How could Zuckerberg not know this? He was on the other side of it last time around.