A week ago I created a profile on PR8 authority site. One week later the profile was ranking 6th in Google for its keyword without any backlinks (the competition is low). Got a little experiment today. Right after publishing nearly 200 blog comments (half of them auto-approved) that profile completely disappeared from Google. 5 hours later it's back again ranking 11th As a "Name" I used the exact keyword I was targeting and I wasn't spinning the comment. What do you think?