Onezen
If anyone is confused, it's important here to clarify:
MATRIX the invite-only criminal org (your link above)
from
Matrix.org, the foundation that maintains an open protocol used widely by many different kinds of people (including by the GOS team)
An unrelated cybercriminal network named MATRIX was taken down
The Matrix.org Foundation has been made aware that an international investigative operation took down a cybercriminal network called MATRIX. The service might have been built using the Matrix protocol, but we’re unaware of it if so.
The takedown site has a Matrix-the-movie branding, which is a probable source of confusion. The app showcased doesn’t look like any of the Matrix clients we’re aware of.
https://matrix.org/blog/2024/12/unrelated-cybercriminal-network-taken-down/