The article quotes AMC about why they're complaining: they worry that if MoviePass fails, people will sour even more on theaters and that could be their death knell (btw, love the use of harrumphed!):

> The largest theater chain in the US instead described MoviePass as as an existential threat. “That price level is unsustainable and only sets up consumers for ultimate disappointment down the road if or when the product can no longer be fulfilled,” the company harrumphed.

(emphasis added)