I have had varying degrees of success with StumbleUpon over the years, but now am scratching my head asking what is going on... I always stumble other peoples content before mine (4:1 ratio - 4 others to 1 mine), and try to follow all the rules. I have a few articles that received a few hundred or few thousand stumbles/visitors, but others that are very similar get NONE. I don't get it... What are the keys to success with SU. I find it hard to believe that one article can magically get 20,000 views, when another very similar viral article gets 5 views. Any advice is appreciated on how to best use StumbleUpon. Also, what is the benefit to: - Lists - Likes - Comments Thanks!