New discoveries in the deindexation research

Guys at EBN blog have posted a new article about avoiding deindexation. There are some surprising results, like did you know that comments can help your blog get more googlebot visits? Or that some expired domains are penalized from the start and you can never get them to index?

This information will again enormously help the SEO community. Go visit the EBN blog and incorporate what you learn when you build new PBNs.