For a large portion of the population, Facebook IS the web. You say it adds no value. I say it adds a ton: Facebook is their Google. Without "a google" - something to make sense of this mess of trillions of pages, the web is damn useless. Google might be your Google, but Facebook is their Google, and becoming more people's Google every day. Sure, you can slot another company into Facebook. But you could do the same for Google too. Doesn't mean they're useless or scams.