In the early days of the internet the big thinkers wrote about the transition of newspapers from print to digital. The old way was to have an article printed on paper. Any corrections or updates would come from a new article on a new day. On the internet, instead of a series of articles, there would be a continuously updating story. The online article was to be a live document and the comments section was to be reader feedback, offering corrections, updates, and opinions on the story.
There might be instances where it worked but it certainly never built up to scale in newspapers. I remember posting corrections and updates to articles on an alt weekly's website and seeing them ignored. Comments are only meaningful if the writer of the article joins in the discussion but the writers are spending their time on new articles. I know of one local sports website with a very active comments section but they are subscriber driven and only subscribers can post comments. Since the commenters have demonstrated a commitment to the website the site's writers will join the comment threads.