It’s also worth keeping in mind that Twitch don’t disclose their anti-spam measures, but I would imagine that an account trying to mass join all live channels, being subsequently banned in a lot of channels, and also sending messages rather than just lurking, could raise a few eyebrows at Twitch.
Bots like commanderroot don’t send messages to channels they idle in, and bots like Moobot, Nightbot, the streamlabs stuff, they are all bots that have gone through the process to be a known/verified bot, so beyond the rate limit increases that may or may not have an impact on the anti-spam measures.