Okay, the DMCA situation is out of control. Like you PretjeNL, I'm receiving complaints from that same collection of seemingly fake companies.
I've figured out which real company they appear to be associated with: Rulta (
https://www.rulta.com/)
I compared the language and style of writing used in the complaints from the fake DMCA services with a complaint from Rulta, and they definitely match.
Does anyone have any idea as to why Rulta would choose to make use of fake names? Possibly to avoid being penalized by Google for dubious, high-volume text-based/automated complaints? I'm on my 6th DMCA complaint for the day today and the situation is getting ridiculous -- they're all affiliated with Chaturbate performers, but they're not from Chaturbate itself.