I posted this thread on some of the google communities (I hope you dont mind Andrew). Todd Cochrane said this :
When we did a community poll more than a year ago, we only had about 25 shows respond that wanted to make their content available aka premium.. Either Pay Per View or Series subscription.

With the amount of content out there, the content in my opinion has to be over the top good.

I am surprised to see even 25 people say they want to go to a premium model.