I don't believe in facebook because I personally don't depend on it and nobody I know depends on it. It's a waning bubble -- people signed up because it was trendy/they got peer-pressured, and they now hang on to it with a vanishing sense of habit.

I also believe that we've barely scratched the surface in terms of insight into their internal surveillance and identity-tokenizing machinery. I believe that if we get to see those details in full glory (e.g. as the result of an investigation) we will be HORRIFIED. This applies to Google as well (or more).