Not getting any StumbleUpon traffic? If not, you may want to head on over to Website Host Reviews where Ryan outlines a list of possible reasons as to why you’re not getting traffic along with a list of tips on how to avoid getting on the bad side of StumbleUpon.
Not enough “up” votes on your articles, possibly within a certain duration after submission.
Too many “down” votes on your articles. Maybe your topic is of little interest to SU users, or of poor quality. Or someone doesn’t like you. (Ah the joys of social media.)
Poor categorization. If you don’t have friends submitting your content/ articles, it’s hard to control which categories are being used to tag submissions.
Speaking of StumbleUpon, have you noticed that the amount of traffic you get from the service is highly dependent on the initial submitter? If anyone else has tips or tricks regarding StumbleUpon traffic, please share them in the comments.