Even better I believe there is a system that can set up circular trades, so if the circumstance occurs where donor A wants to donate to recipient A but is incompatible, donor A instead donates to recipient B who also has an incompatible donor, & if B's donor is incompatible with recipient A, they donate to recipient C, and so on and so forth until donor F or whatever is compatible with recipient A and so completes the loop.

The system is even better in that an altruistic donor with no specific recipient can help not just one person, but potentially unlock chain of donations helping change the lives of multiple recipients.

I heard a podcast about it a couple of years ago... unfortunately I can't remember which it was, but if it comes to me I'll post it here.

edit: Ah, found it - it was Freakonomics: https://freakonomics.com/podcast/make-me-a-match-2/ ...it was also not a couple of years ago, but 7 years ago, almost to the day, which makes me feel ollllllllld 😭