TheStreet: CBS and Time Warner’s Turner Broadcasting are said to have nearly sold out of the available TV and digital advertisements for their joint March Madness coverage, giving the two media companies the leverage to charge what negotiators say is one of their biggest annual boosts in years. The two companies, which share revenue for the March Madness tournament, sold 30-second spots for the TV broadcast of the April 6 men’s championship game for as much as $1.6 million. “March Madness is one of the great annual events, and it doesn’t lend itself to video on demand or binge viewing.”