Could it be a pre-emptive political move to avoid scrutiny from governments where the content that was streamed (Christchurch shooting, some illegal pornography) is illegal? Also, I'm pretty sure they know some of the perpetrators but are probably still building a case. A few years ago they pinpointed the heads of a viewbotting operation and successfully took legal action. I could see them finding a few people to make an example out of, honestly.