Experience with blog commenting

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Originally Posted by MadMax

The biggest issue is that newer versions of wordpress allow settings to noindex/nofollow all links in comments, so unless the blogger is asleep at the wheel they're probably not going to be bleeding PR through comment links. You'd have no idea from the front end, so you could be entirely wasting your time posting comments that will do absolutely nothing unless a surfer physically clicks the links.

Google does not care if outbound links have nofollow tags or not. They do follow those links. However, I share your doubts about blog commenting being an effective method for link popularity.