I can assure you it’s not a corner case: this is one of the things that a lot of creators are concerned about. If a major streaming platform decides your music is not acceptable because you used some AI as part of your production process and blocks your song as a result that has pretty big consequences.

Spotify, for example, already said that any track that gets under 1000 streams will not get any money. What if it says “any track that uses more than a proportion of AI will not make any money” - but refuses to say how it makes those decisions so that people can’t game the system.