My each article is optimized on 2 main keywords and contains 2 back links to my site. I am publishing an article on 50 sites ( blogs + articles + press release sites) and then bookmarking URLs. I do believe it is more valuable than submitting URLs directory links which might have a high PR.
Any comment please if i am not doing contents spamming.
If nothing else, you've diluted the content value across 50 sites (1 divided by 50). Might create a "duplicate content" flag. Might tick off site owners (blogs/articles/press release sites) for lack of exclusitivity. Might create no problems at all.
Me? I wouldn't spread so thin... some times "more" is the straw that breaks the camel's back.