RIAA obtains DMCA subpoenas against Cloudflare and Namecheap targeting forty-one domains for YouTube-ripping platforms and pirate sites
I'm surprised they have a valid case against YouTube rippers, yes they allow you to download a YouTube video but do they ever actually host the file they let you download because I'd peg that as the step that breaks the law. Also its essentially playing whackamole and always has been so I'm surprised they still bother.
The interesting part about DMCA subpoenas is that it doesn't seem like it matters whether the case is valid or not, and a judge doesn't even review them. They just need to be submitted correctly, and are automatically granted (similar to how DMCA takedowns work). From this page:
The EFF has written quite a bit about how easy it is to abuse this power. Here's just one example from way back in 2006: DMCA Subpoena Provision Still Endangers Privacy