2009 Digg PageRank Wikipedia 
WebMarketCentral
MARCH 10, 2009
Site Alexa Rank (March 2009) Compete Traffic (February 2009) Compete 1-Year Traffic Change Google Pagerank Facebook 5 73,787,766 +159.0% Site Alexa Rank (March 2009) Compete Traffic (February 2009) Compete 1-Year Traffic Change Google Pagerank Facebook 5 73,787,766 +159.0% 8 LinkedIn 14 11,246,726 +137.4%
Webbiquity
FEBRUARY 14, 2010
According to Wikipedia (among the worst nofollow offenders ), “The nofollow HTML attribute was originally designed to stop comment spam on blogs. An alarming number of once-respectable social bookmarking sites—Digg, delicious, Mister Wong, Reddit, Mixx, Bibsonomy, Jumptags, Faves, Yahoo! But it all remains true.
Expert insights. Personalized for you.
20 
Let's personalize your content