I meant more: two of the same category of thing, where a submission will spur interest in closely related submissions, or something tangential related.

Like, say, a submission on Jean-Michel Basquiat‘s art follow by a submission on the 27 Club.

Oh yes—we call those follow-ups and tend to downweight them for reasons explained in various posts: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que....

Usually the best place for such links is in the comments of the existing thread.

Of course, once enough time has gone by, such links can become first-rate submissions in their own right!