This is what webrings are:
https://en.wikipedia.org/wiki/Webring
I'm using the graph theory concept of cliques to try to build webrings in nostr:
https://en.wikipedia.org/wiki/Clique_(graph_theory)
It's easy to identify cliques in the nostr social graph and to do that within the subset of users who have a website in their profile. Then if all of the websites in a clique start to link to each other, a decentralized webring can emerge.