I've created an onboarding relay "theforest", as I started with lists, but they were too static.
nostr:nprofile1qyfhwumn8ghj7mmxve3ksctfdch8qatz9uqsuamnwvaz7tmwdaejumr0dshszrthwden5te0vfexytnfduhsqgxqvze3lc4mkzly6wfmclzq4qyy3gjm3u8q7wpvkk6fcdalw3mvkst5kamd has the idea for rings.
It needs to be something more dynamic, at any rate, but not necessarily an algo. The ring idea is something inbetween, like a group-edited list.
Another problem I ran into with lists is that they're limited in length and unidimensional.