Unsuccessful ones, ones that look more like bubbles, are built upon total dependence on external inputs and one-way processes.
Bubbles are not depending for the full 100% on external inputs. Bubbles are sometimes created beceause it happend in thhe past that they were working fine. But now people start to put more and more hope on/in that bubble, those same people who are already inside the bubble without realizing it that they are feeding; by rumours; their own bubble.
Hope is fake work. Culture is real work. Thing is culture you can get for free if you are willing to trade the time.