Re: http://5url.subportal.com/
It is hard for a beginning editor to understand the depths of depravity that lurks in the heart of some webmasters. If you haven't spent an afternoon tracking down and deleting 200 URLs for the same no-content site, or spent ten minutes trying to figure out which hotel-reservation program yet another "best-hotels-in-xxx-paris.com" site was pulling its content from, or whether it was actually unique; or spent an hour trying to scroll through hundreds of auto-generated hotel reservation sites to find some actual unique content for Podunk, New Jersey (multiplied by the number of little towns in your home state/province/duchy/emirate/whatever) ... you can't really comprehend how valuable a service NOT listing these sites is. Well over half of the site submittals to the ODP, and a significant minority of the sites submitted, reflect this kind of non-content.
If you're thinking "personal sites", I agree with you--creativity is in the eye of the creator. But our big problem is not those -- it's all the marketing/promotional/doorways/affiliates/etc. that not only contain no information, but actually conceal information that would have been visible had they not been there. Every time we exclude such a page, we raise the sum of human knowledge.