The OP uses the word "insane", not outlier. It's clickbaity, and used in jest, but I think it better captures a subtlety of this phenomenon: The prolific commenters are molding every discussion in their image. They might have an interesting angle on the story, or they might just be saying trivial things with beautiful prose. In any case, there is a lack of diversity in general -- discussions are driven by the worldview of a few.
That would be an argument for lurkers to make an effort, even if, like this comment, it's just a barely-formed idea.
Edit: "molding the discussion" -> "molding every discussion"
The most interesting point to me in TFA was the 99.8 - 0.2 - 0.0003 rate of lurkers, commenters, and prolific commenters. It's the 0.0003% who obsessively comment (or edit or play games or whatever) all day on anything and everything that I don't understand. I actually think 'insane' is not an unfair commentary on their behavior. They very often drown out the 0.2% who participate but not obsessively, and are often rewarded with special recognition and even 'untouchable' status on various sites.
One of the examples in the post, Ninja, reportedly earns $500,000 per month for that twelve hours a day of streaming. So.