Why do long lines sometimes attract even more people?
People sometimes trust waiting more than advertising.
Long lines can attract more people because queues signal popularity, value, and social proof.
The line is annoying.
Yet it makes the place more attractive.
The hidden mechanism is waiting signals.
Humans assume popularity reflects quality.
Scarcity increases curiosity.
Crowds create confidence.
People think queues are obstacles.
Very often, they are advertisements.
