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).

That does kind of make it sound like think tanks are normally either straightforward or fundamentally honest about their agendas, which they pretty much never are. Even the ones that register and have DBAs fund reports that end up in scientific journals and publish articles through chains of obfuscatory intermediaries.

Really only possible in broken-futureland, to have a company whose sole purpose is to get paid to have an opinion.