It is called reader loyalty. And it still exists. But only just. “What we have recently experienced is that a growing number of readers have been phoning in to our offices to let us know how important it is for them that we are still putting out a print version of our paper.” Those are the words of Benjamin Piel, the editor-in-chief of the MindenerTageblatt, a daily newspaper published in the town of Minden in the northwestern German state of North Rhine-Westphalia. Its circulation is currently running at around 26,000. But that number is shrinking — despite those loyal subscribers...