Alan Mutter worries that “exploding” mobile ad expenditures, which rose to $5.3 billion in the first half of 2014, may be a further setback to publishers this year. It’s only logical, he argues, that ad dollars will begin to funnel over to smartphones and tablets, where users spend an average of two hours and 51 minutes a day compared with newspapers, where users spend 26 minutes average a day (coupled with magazines).