Something can be popular because it is useful or because it is entertaining.
FB is entertaining, people are amused by it.
They get to talk about themselves.
Other then that, it has very real use value, since millions of people live without it without any problem.
No one has to 'experience' FB to know that it simply a waste of time.
And I think many are coming to realize this.
hahahaha OK wasn't it you who said I need a dictionary?
Useful and entertaining are not an "either or" issue.
Useful means just that "Having a use and providing a benefit."
Now you are flailing you don't even understand the words you are using.
Face it sparky. You have no idea what you are talking about!