I didn't really follow the development of the Kozjin project, but my friend was there as the telegram group admin, and my friend was very careful when choosing projects to be moderated,
I do not recommend, but at least the project is legit, and it is proven that my friend dares to be an admin there, but for quality I do not know, maybe you can ask the team directly about the advantages and usecase of the Kozjin project.