Bulk Advertising CPM Rates Take 11% Hit in Q3

CPM rates (the cost to display an ad 1,000 times) for bulk, untargeted campaigns dropped 11% in Q3 according to Rubicon.
Social networks saw CPM rates drop 3%.
Perhaps even more interesting are the VC numbers: VC’s invested $800 million in ad networks in Q1, $400 million in Q2 and $241 million in Q3.
Get the full report here.
A drop in CPM rates doesn’t neccesarily indicate a slowdown in ad spending — CPM relies on supply and demand, and a constant influx of new sites keeps the supply of ad space going up and up.