Ad revenue increased but not enough to cover enormous new  Recruiting new subscribers by direct mail, printing more magazines, and mailing more magazines are tremendously expensive operations.
The more copies a magazine sells, the harder it becomes to maintain a steady profit.
mnli hypothesis: The more copies a magazine sells, the harder it becomes to maintain a steady profit. premise: Ad revenue increased but not enough to cover enormous new  Recruiting new subscribers by direct mail, printing more magazines, and mailing more magazines are tremendously expensive operations.