I don’t think the issue is the fact that the songs were AI generated as much as it is he faked tens of thousands of customers (presumably in free tiers) streaming the songs that he owned in order to collect royalties. That does indeed sound like garden variety fraud to me.

If you and I have a contract that I’ll pay you for unique shoppers referred to my store and you just go in yourself to trigger the door counter 10,000 times wearing different disguises, it’s pretty clear that you have defrauded me.