According to insiders, the ad inventory in and around the 67-game 2015 NCAA Men’s Division I Basketball Tournament is tighter than the Virginia Cavaliers’ asphyxiating pack-line defense. Advertisers have snapped up more than 95% of all available airtime in the linear TV broadcasts and the March Madness Live digital stream.
via March Madness Is 95% Sold Out Across TV, Online Inventory | Media – Advertising Age.