My 2 yen:
I think people want to continually get more content even if it is based on already published material, but in a new format. This happens over and over with print books.
Personally, I find myself searching for new videos on my favorite topics on YouTube even if the information is not that new, just another take on the subject.
Easily digestible content is something for the web publisher to strive for or for longer content, a more engaging way to present it maybe?