Blue Tracker is based on the type of Blue Poster. BlizzTracker will highlight items from Community, Dev & QA. CS posts aren’t tracked on the BlizzTracker (we’re super active, and would easily push out any content your average forum-goer might be looking for).
Since clicking on the BlizzTracker will filter down the forum that you’re viewing, make sure to select BlizzTracker from the Forum Index to see absolutely all of the posts!