I might be branded a cowardly paperhanded turncoat, but I vibed a nostr article to substack publisher. The script by default prepends a message "originally on nostr" that clicks back to nostr via njump.me or your custom method. Seems to work except for animated gifs and footnotes (so far).
The prepend may just bring some traffic or at least raise awareness.
https://github.com/djinoz/NostrToSubstackPublisher
ref: 
