Using the term "elites" was overly vague when "nation states" better narrows in o n the current threat profile.
The content itself (whether niche or otherwise) is not that important for understanding the effectiveness. It's more about the volume of it, which is a function of compute resources of the actor.
I hope this problem continues to receive more visibility and hopefully some attention from policymakers who have done nothing about it. It's been over 5 years since we've discovered that multiple state actors have been doing this (first human run troll farms, mostly outsourced, and more recently LLMs).
The level of paid nation state propaganda is a rounding error next to the amount of corporate and political partisan propaganda paid directly or inspired by content that is paid for directly by non state actors. e.g.: Musk, MAGA, the liberal media establishment.