You can't pay for PR this good. P Diddy, Shaq, Ellen, Kutcher, Fry, etc. They tell people about it because they like it. They probably like it for reasons that

You can't pay for PR this good. P Diddy, Shaq, Ellen, Kutcher, Fry, etc. They tell people about it because they like it. They probably like it for reasons that are different than normal people. They want to maintain relevance as celebrities. Twitter is a way to do that.