Does 1 link from site A have as much value as 3 links from site A? The 3 links are still from the same IP address. Are sitewide links more powerful than single page links? My guess is that it is better to have 3 single links from 3 separate sites with unique ip addresses, than it is to have 3 links from 1 site... given that all of these sites have the same pr. If this is true, then what is the advantage of submitting many articles to the same article directory? Sure, you'll have more keyword rich pages in that directory and your articles will rank for different keyword searches in the search engine, but essentially, will it make a difference to your site in the serps? Also, how many times could your article be used before it loses its value because of the duplicate content factor?
sitewide links used to work like charm few years back but they dont work that way anymore. after a few links, they don't pass any further link juice.