Back to your question, like several others already replied, no reciprocal link is required. However, today I received an almost unique email from one of those sites violating the ODP license. Think gworld should be an expert by now - elaborating about the correct use of the RDF-dump.
my point is, that DMOZ is ONE WAY LINK DIRECTORY, because dmoz does not ask you to exchange links. all of us can create something like dmoz, my big questions, what is the point of DMOZ. i never use. and i am sure, most of the people who visit dmoz, they want to "get on ".
DMOZ started before the days of reliable search engines so finding the info you needed was really hard. I remember when Northern Lights was a big player, Yahoo was already in decline and then suddenly up popped Google and everything changed. But what Google did is it used DMOZ as the start point for it's indexing so being in there was still really important. And other people used the directory to build their own so it was a good way of getting alot of sites linking to you And then Google let it be known that not only were those links valuable for human traffic but the index was counting them and using them to help rank you And DMOZ stayed important Then Google created it's own directory based on DMOZ reinforcing the DMOZ value. Now, Google is looking at moving away from DMOZ, at disregarding directories that look like DMOZ clones (but the real thing is still good) and that will change the focus. The next big crisis for DMOZ, though, is getting it's servers reinstated and ensuring that AOL fund and resource the directory appropriately. If they don't - there will be thousands of disaffected consumers out there. Some will be customers, some will quit AOL, and others like me will be irrelevant because AOL doesn't operate where I live. And a year down the track will AOL be remembered as the company that killed DMOZ? Yes, but only in a vague "that was a shame" kind of way. If they AOL do come to the party and keep DMOZ running then it'll be business as usual.