Total social network ad spending in the U.S. will drop 3 percent to $1.1 billion in 2009, from $1.2 billion last year, according to projections from eMarketer. This is a major reversal: spending grew an estimated 33 percent in 2008 and 129 percent in 2007. The news shows that while social nets continue to attract millions of users, the ad dollars don’t seem to be following in kind.
