Variety: One of Madison Avenue’s most influential agencies is about to be put through a major restructuring – just weeks before it is expected to help advertisers figure out how much money to invest in TV commercials and other types of ads. The average person doesn’t hear much about Starcom Mediavest, but the large media-buying agency is responsible for the allocation of millions of ad dollars to media outlets like CBS, the New York Times and BuzzFeed each year.