The idea that people are perfectly rational actors with perfect information has long since been debunked.
I'm not sure what perfect information has to do with anything. It's impossible that perfect information could ever exist.
I suppose you have your own definition for "perfectly rational" that you're standing by, and that's fine. But I fail to see the point. How is that relevant to this thread?
I originally posted that people wouldn't use these web services if they didn't receive some benefit from it, and you've done nothing more than present red herrings.