Internet advertising revenues cracked the $4 billion mark in the third quarter, according to the IAB and PricewaterhouseCooper LLP. Revenue for the quarter hit $4.2 billion, up 33 percent over $3.1 billion in the same quarter last year but only up 2 percent sequentially.  This marks the eighth consecutive quarter of growth and the largest single quarter ever for internet advertising. David Silverman, Partner, Assurance, PricewaterhouseCoopers: “This growth follows the trend of where consumers are spending their media time and the unique ability of Interactive advertising to effectively target and monitor ad campaigns.” Release.