1) facebook, twit, and everything else submits via a url string.
If the string is pre formatted on your post (laggy):
example: facebook.com&title=blah blah&url=mysite.com/blah-blah
This is sending page rank to facebook.
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2) If they have an external script with a php redirect (faster), it redirects to the plugin authors site, where the script then redirects the commenter to facebook.
This is sending page rank the plugin author’s site.
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3) Now, you could nofollow those links, however it will still reduce the active pagerank:
5 links on page, one is that facebook post link, 4 are internal links.
pagerank for that page = totalpagerank minus 1/5 of total to your 4 internal links.
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4) When you make your own using php redirect, it is hosted on your site, which mean pagerank goes to you
example:
it killed off my code here, imagine a php file on your site
This is sending page rank to your site
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LOL you could be the plugin author,
