I think that and also some people want to be able to speak about topics they don't know about. For example a friend of mine (a doctor) was not familiar with the

I think that and also some people want to be able to speak about topics they don't know about. For example a friend of mine (a doctor) was not familiar with the concepts of "agile" so he went and had downloaded a book summary as audio and listen to it during his commute. Now he doesn't feel like a complete idiot when the topic comes up. I guess he pays the service exactly for this feeling