What does it mean to subscribe to something? Whether we mean a belief or a magazine, the definition is complicated. I began subscribing to The New Yorker when I was a sophomore in college; more than 30 years later, I have yet to stop and I feel strongly that I never will. Yet during some of those years—okay, many of them—the weekly issues have piled up in my home and gone mostly unread between biannual days of bingeing and purging. If these reading habits could somehow be converted into digital