“The only search engine that relies on Dmoz is netscape.”
Netscape uses Google. Google uses DMOZ. But apparently you are saying that only Netscape has links to DMOZ categories. Even that is incorrect. AOL, Excite and Alexa do.
http://search.aol.com/aolcom/search?invocationType=topsearchbox.%2Faolcom%2Fjsp%2Fsearch.jsp&query=gambling
http://dir.excite.com/d/search/p/excite/?c=directory&s=gambling
http://info.alexa.com/
Also, All the Web’s “clusters” at the bottom of the page are DMOZ.
http://www.alltheweb.com/search?avkw=fogg&cat=web&cs=utf-8&q=gambling&_sb_lang=pref
But the traffic you get from the directory itself is not the main value of a directory listing. All the search engines, including Inktomi, crawl dmoz. All assign some algorithmic value to its links. Google in particular relies on DMOZ for a human counterbalance to its bot link crawling.