So does this one deserves 10000 links?

http://search.dmoz.org/cgi-bin/search?search=topix.net

Don't understand this Even if it's such a big site isn't 10000 pages a bit to much? That would be like indexing 10.000 pages from wikipedia :icon_ques

There is no "quota" of listings based on site size, so if you're thinking along those lines, everything you think will be wrong. And, in fact, Wikipedia might well BE the next site to get 10,000 links.

Ok I'm not going into debate on this one, wikipedia is an online encyclopedia containing articles and not websites. The articles could be/are interesting and well written and contain usefull info, yet they are part of 1 site. Isn't dmoz about indexing websites into categories instead of placing "usefull info" into the categories. 10.000 links from 1 site looked

The norm is one listing per website. In "exceptional cases" editors may list "deeplinks" (see the editors' guidelines, which are publicly available.

Since the "exceptional cases" ARE driven by placing useful information into categories, a given website might have 10 deeplinks or 10,000 (the guidelines say nothing about that.) It would be silly to deny the "Galois Groups" category a good Wikipedia link because there was already a deeplink elsewhere, say in the "Fourth Ruritanian Civil War" category!

It is also safe to assume that any large-scale systematic deeplinking (specifically including both of your examples) is periodically discussed by the editing community, and as a result of developing consensus, adjustments are periodically made to the standard practice as well as to previous listings.

Don't think in terms of "websites" DESERVING links. It doesn't matter what the website deserves, because we don't ever do anything for websites anyway. (It's all for the surfer.) What matters is the tradeoff between the increased costs of deeplinking, and the increased value to the category structure.