Also, I remember web rings being helpful for content discovery in the mid-late 1990s. Different authors for a given subject would cooperate with each other and

Also, I remember web rings being helpful for content discovery in the mid-late 1990s. Different authors for a given subject would cooperate with each other and put something like a banner add at the bottom of their page with "next" and "previous" links, so you'd get a doubly-linked list circular ring of cooperating sites for a given subject.