It makes more sense when you think of it as a game instead of some sort of location sharing system. Games are popular for a while, then they're not, for no rea

It makes more sense when you think of it as a game instead of some sort of location sharing system. Games are popular for a while, then they're not, for no real reason. One year everyone is playing it, the next year no one is, or just an odd collection of dedicated fans. Occasionally you have games that hold on for decades, like bridge or World of Warcraft or Settlers of Catan, but it's just a longer scale rather than true permanence.