There are various reasons which are explained as: There is no Original Content which is required to make a Quality Site. Duplicate contents as all scripts extract live data from Dmoz and create thousands of similar pages on the web. The Dmoz directory has more than 580,000 categories If thousands of site will grab the live contents from Dmoz it will results into creation of millions of similar pages which is making web a junkyard of similar pages with nothing new.

The Dmoz clone sites has thousands of pages created on fly with no extra hardwork and lot of spammer are using it for advertising or Google adsense program The lot of webmaster has just created a section of Dmoz to get inbound links from thousands of pages to increase link popularity and search engine ranking Text link advertiser also created Dmoz clone to sell links on thousands of pages to increase artificially link popularity of text link ads buyers.