I have a pretty dumb friend Amanda (she gets called "Aman-duhhh" a lot behind her back, that's how dumb she is), who yesterday said,"I don't think I want to pay for LinkedIn anymore. It's not worth it." I said, "What are you talking about?"

Amanda: Huh?

Me: Linkedin is free.

Amanda: (lengthy pause with really vacant expression) Huh?

Me: I mean, you can pay for LinkedIn, but only for poweruser features you don't need. Otherwise it's free.

Amanda: Nooooo...?

Me: Yeeeahhhh...?

Amanda: I don't believe you.

Me: (gets out phone and pulls up linkedin) See on the join page where it says at the top in big letters, "To join LinkedIn, sign up below ... it's free"?

Amanda: (another lengthy pause while she processes this information, well "process" may be a strong word, let's go with "absorbs") Well, how much does Facebook cost?

Me: HA! Facebook is free.

Amanda: Nooooo it isn't.

Me: AmanDUH! Yes it is! All of these social networking sites are free.

Amanda: Why?

Me: What do you mean "why?" Why are they free?

Amanda: Yeah. Why don't they charge you? How do they make money?

Me: Ads. Selling your personal information to third-parties.

Amanda: (chewing on a lettuce wrap for too long) Really?

Me: Yeah, really.

Amanda: Maybe I should sign up for Facebook.

Me: (quietly to myself) I question why we're friends daily.