Premise: DMOZ (from "directory.mozilla.org", an earlier domain name) was a multilingual open-content directory of World Wide Web links. The site and community who maintained it were also known as the Open Directory Project (ODP). It was owned by AOL (now a part of Verizon's Oath Inc.) but constructed and maintained by a community of volunteer editors.
Hypothesis: World Wide Web links were once listed in a directory which was built by an unpaid community.