Which groundbreaking advertising technique was first used for 'The Blair Witch Project' (1999) that revolutionized film marketing?

The film industry has pioneered some of the most innovative advertising techniques in history. From teaser campaigns that build anticipation to viral marketing stunts that capture public imagination, studios have constantly pushed the boundaries of promotion to draw audiences to theaters. Test your knowledge of these groundbreaking advertising strategies that changed how movies are marketed to the public.

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Fake documentary-style 'missing persons' campaign suggesting the film was actual found footage
Celebrity endorsements featuring A-list actors claiming to be terrified by the movie
Interactive movie posters with augmented reality elements revealing hidden scenes
Limited theatrical screenings with waitlists to create artificial scarcity