> Surely a AI generated song isn't a "fake song"?

Eh.

> Is it a crime to publish an AI generated song?

It's not. And a lot of this fraud was done with non-AI songs. But it helps show his attitude.

> It seems that what he is guilty of is to generate some fake users pretending to listen to his songs, is that right? I can see how it is fraud, but how is it different from all the dark patterns used by newspapers to generate more page prints (like auto-refreshing pages)?

Does that get them more money just for showing the ads? Usually the number of page views is up to you. If you find a way to make oodles of money off a mechanism like that, it very well might be criminal fraud!