Look at it this way. You have a friend, Joe. Joe coincidently starts playing Civ. He's talking to you and says "Man, I found this great game, but I'm having problems with it. It's called Civ and..." You cut him off and say, "Hey, I play that game too! There's a great forum, the very very best on the net, that is dedicated to Civ! And there's an active OT forum as well. Here, use
this link to sign up!"
So Joe gets on the net, and signs up to CFC using the above link. You referred him here, and by using the link above, you get credit for it.
Does that make more sense?