The world doesn't (need to) run on giving only what you owe. People donate to creators not through moral obligation, but because they like what the creator has made and they want to reward them for it and/or enable them to make more of it.
Why do you think Patreon (and others) is so popular? Any cynic would surely point out that from a purely transactional outlook, the donors are getting a bad deal. And yet.
Machine Unlearning is a very active field right now but basically ~~no~~ not really