Depending on the quality of your website content or your article content, the social bookmarking can get you many visits if the content is viral and amusing. If you have quality content you can get a lot of visits from sites like stumble upon, digg, reddit, facebook, etc... So if you think you have a quality and viral content you can post it on one of these sites and get visitors which will review and re-share your content which will get you even more visitors.
I recently did my own case study where I bookmarked an innerpage with close to 1000 bookmarking sites for a competitive term. After 3 weeks i've gone from #63 to #5 and have been at #5 for a week now for what its worth. I also made sure to index my bookmarks.