Google moves to sever ties with WPP-backed ComboTag following AdBlock Plus ‘surprise’

Google is in the process of terminating its relationship with WPP-backed Combotag in the wake of yesterday’s ‘shock announcement’ that AdBlock Plus is to launch its own ad exchange, which it implied that advertising behemoths Google and AppNexus would help facilitate – a move that both parties have denied knowledge of.   
Speaking on the sidelines of this week’s Dmexco conference hosted in Cologne, Germany, Sridhar Ramaswamy, Google's senior vice pres