Digg has recently made changes to the way the social network site links to external sites.

We’ve added rel=”nofollow” to any external link that we’re not sure we can vouch for. This includes all external links from comments, user profiles and story pages below a certain threshold of popularity.

According to Matt Cutts, this is a smart move since Digg isn’t adding nofollow to everything.

So new move by Digg is a positive change in my opinion, because Digg decreases the benefit for spammy stories but Digg still helps normal and high-quality stories in the search engines.

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