He has made tons of cash, built amazing stuff. Run and sold a start up and is currently running a small company. He has enough cash to retire, but he is one of the folks to whom retirement doesn't mean not working. He doesn't have a blog, his idea of social network is probably his linkedin profile, nothing more. And he doesn't harp and tweet about every single discovery he is making every two hours(which is pretty common today). He just works like crazy, gets work done, makes his money as silently as he can.
There are a lot of folks like these, but they are hidden, they keep to themselves. Make enough money doing what they like. And are generally at places they want to work at. You can't really interview such people. Because they choose you, you don't get to choose them.
So clearly common interviewing techniques are not for guys like these. And most of these guys don't work at big Web giants.