Would you still call it a "cult" if each recruit winds up inside their own separate, personalized, ever-changing rabbit hole? Because if LLM, Inc. is trying to maximize engagement and profit, then that sounds like the way to go.
If your manipulative spouse believes in "bizarre" untruths and convinces you to believe in them as well, afaik, that is one of the criteria for Folie a deux (or Shared delusional disorder).