Which pioneering recommendation system feature did Netflix famously offer a $1 million prize to improve in 2009?

Netflix, Amazon Prime, Disney+, and other streaming platforms have revolutionized how we consume film and television content. At the heart of their success lies sophisticated recommendation systems that keep viewers engaged and discovering new content. This trivia question tests your knowledge about these powerful algorithms that shape viewing habits across the entertainment landscape.

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Content similarity engine that suggests 'More Like This'
The Netflix Prize for 10% improvement in predicting user ratings
Personalized thumbnail generation algorithm
Category row curation based on viewing time