Real-World, Operationalized Applications of Multi-Arm Bandits Multi-armed bandits are wonderful and have lots of potential applications. However, I don't know many companies or real-world practitioners who have implemented bandit algorithms.

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*What are some examples of multi-bandits that are up and running? By this I mean: An organization (company, government or whatever) has implemented the bandit. And the algorithm is live, performing explore/exploit and touching real-world decisions that change something (large or small). In the real world.

*Refute this claim: "Bandits are an academic novelty. Despite attractive theoretical properties, practitioners have systematically refused to adopt them in practice since their invention in 1952."

Note: I'm not asking for potentially good (new) uses for bandits. There's already a question about that, and I agree there are lots of potential applications. I'm asking what anyone actually has used them to do. Lets list the biggest and most impressive applications!

I also found that Amazon uses bandit algorithms for the learning-to-rank problem and its specific applications to NLU. It is old but maybe it seems interesting.
https://www.amazon.science/blog/a-general-approach-to-solving-bandit-problems
