Since there's a facebook fanpage for Cluthfans now, it would make sense to just associate one's facebook account to the comment columns under your article. However, I prefer discussing Clutch's articles in GARM simply because a larger fan base. More over, you can post pictures and gifs in the bbs and I doubt if the comment column could do the same.
I don't much care for it personally since I like the forum better for discussion. But I have a narrower perspective as an already active CF member. So if it is better for the site, then I'm all for it.
Don't like. Feels like duplication and segregation from the main area for discussion. However, if, as others have mentioned, the goal is to drive traffic to the front page I don't think it's so bad that you shouldn't do it.
Just now catching up on these last couple of articles. Good stuff Clutch. As for the direct comments, I would second the feedback below:
Don't like it for most of the same reasons others have already stated before me. Another 3 reasons for not liking are: 1) No timestamps on responses. 2) Can not use "ignore" for your usual dumb posters. 3) Not forcing them to register invites more trolls.