I have a similar question for our royalty payments to authors, translators and producers of our books at konsensus.network

If you know the split up front you can actually just broadcast the note with all of the participants in zap tags with their respective weights https://github.com/nostr-protocol/nips/blob/master/57.md#appendix-g-zap-tag-on-other-events

yes, i have a bunch of thoughts. just sent you a dm.