The average amount of actual game action over the course of a three-hour broadcast of an N.F.L. game is about 11 minutes. Fans watching the first week of this season’s games might have been struck by how much of the rest of the broadcast was filled by advertisements for the hottest product in the sports industry: daily fantasy sports games.
The two biggest players, DraftKings and FanDuel, have unleashed ferocious promotional campaigns in recent weeks, costing millions of dollars, in hopes of gaining supremacy in a surging pastime that, so far, stands on the permissible side of sports gambling.