The phrase "article post" refers to a written piece or blog entry that is published online or in a newsletter. It usually represents an informational or opinionated writing by an author on a specific topic. Full definition
Better to have ten posts addressing the issue of appropriate targets, and a few articles posted by experts with differing views on the appropriate targets. (realclimate.org)
That you make multiple comments here that end up at an average of 50 comments on articles posted here does not mean you number anywhere near 100. (justarsenal.com)
From the looks of the comments I see on all sorts of articles posted on all sorts of sites, those people make up a pretty substantial % of the population. (religion.blogs.cnn.com)