Explore the challenges and solutions faced by Duolingo when unexpected changes in the AWS Spot market disrupted their cost optimization strategies. Learn about the potential causes of market instability, tools for assessing discount impacts, and key actions taken to manage infrastructure costs amid uncertainty. Gain insights from this 17-minute conference talk at SREcon23 Europe/Middle East/Africa, presented by Max Blaze from Duolingo, on adapting to sudden shifts in cloud pricing and maintaining cost control in dynamic environments.