Digg one of the popular social media sites, ranking about 53 according to quantcast.com.
Many articles are posted on digg and most of them deserves to be popular, but they hardly get 2 to 3 diggs.
One secret of how to get good number of diggs is to sign up and build up a huge network of friend, and each time a story is posted it has to be informed to all friends, then every friends diggs the story and make it popular.
So, I think it got more a planned networking site than media.
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