> We’ve been down this road before. “First movers,” as SpaceX is, have what’s known as a “lock in” advantage. We see it with all of Google’s services and we see

> We’ve been down this road before. “First movers,” as SpaceX is, have what’s known as a “lock in” advantage. We see it with all of Google’s services and we see it in social networking with Facebook. Was Facebook a "first mover"? In what way?