I hoped the article would go into more depth. For example, propagandists store caches of videos and imagery on distributed servers to keep circulating it, and manually or automatically run imagery through filters that distort the image enough to fool computers but are still easily recognizable to humans. In some cases this is done to such a degree that it becomes a kind of in-group aesthetic, a style distinctive enough to be its own signature and obviate the need for attribution.
Unfortunately most of the high quality writing about it tends to focus on state actors, or else be hand-wringing 'extremists are terrible, why won't social media companies do something'.
