Since 2008, Google TV Ads had been selling inventory for NBCU’s CNBC, MSNBC, Oxygen, SyFy, Chiller and Sleuth networks.
Sources tell AdWeek that NBCU concluded "there was little value derived from having an Internet company sell its ads," adding that newer networks like Chiller and Sleuth have now been assigned dedicated internal national sales teams.
Some critics also challenged the online auction model as a vehicle for TV ad sales, while others pointed to a lack of quality available inventory.
Google still counts DISH Network, DirecTV, Tennis Channel, Ovation and other partners for its TV ads unit.
http://tinyurl.com/2dn2nuc (DMW previous coverage)