Let's not forget, there is a real possibility that an author has died. In the world of online authorship, and pen names—avatars that may have no meaning to anyone else—and anonymity, it is nearly impossible to know for sure if an author is still alive out there to continue their work. Without close people who know that you write, or where you write for, who's going to let everyone know that, say, Ron (me for example) the author, has died, folks—there won't be anymore words. It's sad to think of, but it's definitely a possible answer as to why the writing ends.