The combo will extend Sapient’s presence across four continents, by connecting with the offices belonging to New York-based Nitro, which was founded in Shanghai. Although it runs an ad net, Nitro is considered a full-service agency. The deal is a twist on the usual arrangement, where a traditional ad firm buys a digital one. The recession will likely force a combination of all kinds of ad agencies, as the business continues to struggle amid a severe pullback in client spending across the board.  Release