So a little earlier than episode 200, but that shift I mean at the time I think you will remember to the sort of subscription model for readers. (thecreativepenn.com)
I'd like the ability to sell technical ebooks in a sort of subscription model, letting customers download updated versions of the same ebook. (lulu.com)
But one publishing arena that has had some success with subscription models for digital editions is the academic publishing sphere, specifically for digital textbooks. (goodereader.com)