EXCUSE ME?
There are thousands of very good posts in OT that are positive contributions to this site. Thanks for insulting a lot of fellow forum members, some of whom are still actively playing Civ and participating in the Civ areas of the site.
He was being hyperbolic, but there is a point in there: the overwhelming majority of what takes place in OT is people arguing opinions on extremely contentious matters. Pretty much whatever you say in such conditions is only going to be regarded as a good contribution by people who already agree with you, and from whom an unexpanded indication of agreement or appreciation has no value. Where many such indications are forthcoming, all you're going to get is the aforementioned 'circlejerk'.
By contrast, where the main purpose of a forum or thread is to give and receive advice, there will often be times when a comment like "yeah, I've also had success with that", or "thanks, that totally solved my problem" does provide additional information to the reader. When a few of those comments appear, and nobody steps up to disagree, you can be fairly confident that what has been suggested is worth a try.