Replied to a post on seblog.nl :

The idea that "a Reader could boost posts when they are from a feed that is not regularly updated" is implemented in Newsblur, my RSS reader of choice. They call it "Infrequent Site Stories" and it is a quite powerful tool to find interesting pieces of information in a huge number of posts. http://blog.newsblur.com/post/168429041705/infrequent-site-stories-is-the-blog-reader-we-need