Designing products that advertise themselves is a particularly powerful strategy. Steve Jobs and his team realized that seeing others do something makes people more likely to do it themselves. When something is more observable it’s also easier to imitate (as in the case of white Apple earphones or the backlit logo on their computers). Thus a key factor in driving products to catch on is public visibility. If something is built to show, it’s built to grow, or as another famous saying goes: “Monkey see, monkey do”.