Comment links: an experiment
As you might know, I do a lot of blog SEO. My article on WordPress SEO pretty much sums up my ideas about it, but to get those ideas, sometimes you'll need to experiment. One of the things I've always been a strong proponent of, is the use of nofollow to sculpt internal PageRank. Now Matt has made that sort of impossible (at least that's what he says), so I'm looking at other tactics.
But if you stop using nofollow for PageRank sculpting, maybe you should also stop using it in other areas. I've been thinking about what I should be doing with the links in my comments for a while now. Even though nofollow still works to prevent link juice from going to those sites, links associated to comment authors are, at best, fun, but hardly ever add anything to the conversation.
So why should you link out to comment authors? Sometimes it helps to understand their background and makes the conversation easier, so when a post is fresh, and still being commented on, it provides a sort of usability to be able to click through to the commenters side. But that effect is gone when the comments have "died".
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