How good are the document sharing sites like scribd.com, docstoc.com, sildeshare.net from Social Media Marketing and SEO standpoint? Has anyone ever used them as a part of their online marketing campaign? If yes, how were the results? (Please share experiences, good or bad) It would be great if you could throw some inputs on the linking value, content duplication issues, search engine rankings and traffic that these sites would offer in comparison article directories? Thanks in advance!
I personally feel that all these websites are pretty good and trustworthy for document sharing. As I have been sharing since long on all these websites.