The article presents widely how the people it describes all live in communal housing, engage in harmful psychological practices, have a shared belief in the imminence of the Apocalypse, etc.
Separately, that other article also mentions harmful psychological practices like "debugging" and sleep deprivation.
Note that I make no claims of my own - for all I know both articles could be complete fabrications. I'm merely listing what these articles claim. I personally know none of these people, and live halfway around the world from them.