I've been having weird shit like this happen to me too. Like, I'm literally just sitting there fully clothed just chillin' with my people talking about random shit and suddenly there's 100s of anons joining. I don't use hashtags or promote myself so I have no idea where the people are coming from. I don't think too much of it. Haven't had that type of spam with it though, but I do use this:
https://chaturbate.com/apps/app_details/antispambots/
All of the anti spambot bots need updating, I don't think any of them are working at the moment.
Those "discord" spam bots are somehow managing to get around the captcha - most I think use a 4 digit captcha, which is a 10,000 combination to crack.
If the bot developers could introduce the alphabet too, and/or also increase the amount of characters (digits/letters (combination of both) these greys and bots must post to type, it hopefully should make it near impossible for them.
For now, the "michal73 - Antispambots" one definitely doesn't stop them, and another model I visit had these In her room, the only temporary fix i could think was to add a second captcha bot so she has 2 running at the same time. This so far has worked and it instantly stopped them being able to post in her room.
So if they are bypassing for everyone else too, try 2 captcha bots for now, and wait and hope the devs for the current bots will improve them
Edit:
The second one she is using alongside the "michal73" one, is this one:
https://chaturbate.com/apps/app_details/captchabot
Edit, oh wait I realised he has an "extended" one, not sure if it works:
https://chaturbate.com/apps/app_details/antispambots-extended/
If anyone can test it and let us know it'd be great