The Google Directory PageRank is an 8-unit measurement. These values can be viewed in the Google Directory. Unlike the Google Toolbar which shows the PageRank value by a mouseover of the green bar, the Google Directory does not show the PageRank as a numeric value but only as a green bar.

And forum spam is when someone posts messages, usually with links to services like SEO, in a forum or on a topic that has nothing to do with the message posted. In some cases, they even create topics, again, that have nothing to do with the forum in which they are posted.

Oh! That's what this is! So I removed the link with the hope that you'll contribute something useful, rather than trying to increase your own pagerank at this site's expense.
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