Forgive me, but the numbers presented in that graph look to be growing, it’s their relationship that’s changing. People are still using Facebook, they are just

Forgive me, but the numbers presented in that graph look to be growing, it’s their relationship that’s changing. People are still using Facebook, they are just using it on a more reasonable frequency that is common to all things, after a certain infatuation period is over. It appears to me they are just reaching a steady state. If you look at any relationship between two events sampled at different intervals you tend to see this pattern.