CardboardCowboy saw his account banned from Twitch after he streamed music to which he owned the rights. The streamer appealed the ban, but that appeal was rejected with no explanation for why the original ban stands in the first place, just that he “violated Community Guidelines.” Apparently, CardboardCowboy isn’t allowed to fun a lo-fi channel that plays music 24/7. Even if he owns the rights 100% to it.
Source: Twitch Chaos as Musician Banned For Streaming Own Music