In a narrative that intertwines a spooky Halloween theme with a real-world engineering challenge, the author recounts the experience of launching a video streaming service for a major sports league, which initially faced significant issues with overprovisioning on Amazon DynamoDB and Redis. The service's unforeseen data demands led to substantial costs, as the team had to transition from DynamoDB to a managed Redis solution, resulting in an overabundance of underutilized resources due to the high instance costs and single-threaded nature of Redis. The story highlights the challenges of managing cloud costs and the inefficiencies of paying for idle resources, ultimately leading to the development of Momento's serverless caching product, which emphasizes a fair pricing model that charges only for the data actually used, promising a more cost-effective and scalable solution without the complexities of traditional caching services.