I think it's a misunderstanding of what is alleged here. It's not alleged that the website produces propaganda. It's alleged that the website is fake, designed to seem like a legitimate source of information where info about it is just not available, in order to get AI to scoop up what it writes and treat it like a legitimate source of information vs how it would treat a real think tank which has a point of view that's documented and known in the world

A real think tank with real authors and disclosed funding sources could have something one can learn about it and its political leanings. A fake one can seem impartial due to little info existing about it (since it's fake).