Exactly, I don’t think there was anything illegal here. At best it’s breach of contract with Spotify or whoever, and they could get sued. MAYBE there’s some interpretation of fraud that could apply? But it’s not like he sold anything and misrepresented it.
I’ve never heard of someone being arrested for breaching ToS though. They could be sued for breach of contract, but that’s it. So far the only thing I could think of is if the bots were illegally acquired by hacking devices or something. There’s nothing illegal about paying for a server and having it download free Spotify streams.