Prism creation is made possible through this often overlooked part of the zap spec https://github.com/nostr-protocol/nips/blob/master/57.md#appendix-g-zap-tag-on-other-events

This part of the spec allows you to add multiple zap tags to a single note, each with their own relative weight split.

This is essentially a prism, our service simply coordinates the creation of these zap split notes.