Thanks for sharing - I didn't know about the royalties, if that works then that's sensible. I'm afraid I don't quite understand why NFTs would be necessary for the rest though, other than just being a contingent catalyst stimulating the creation of generative art. If it's purely the fact that you're buying something from them, them sending you an autograph, or a video in which they say "thanks X6S1x6Okd1st for buying this video" seem to have the same effect (though with the "downside" of you not being able to resell it to make money off it yourself).
Is that not only if you sell the NFT to someone else again, presumably because the artist has become successful? Do you have any insights into why that person would buy it from you - it seems the attractions you listed would no longer apply to them?