The iGaming industry, encompassing activities like sports betting and online casinos, demands a high-performance backend to manage unpredictable traffic and ensure seamless user experiences, with databases often being the main bottleneck. Critical transactions, such as wallet operations, must meet strict performance requirements to prevent user frustration and churn, while processing must ensure accurate distribution of winnings across multiple wallets. Couchbase's NoSQL database architecture is highlighted as a superior choice for handling high transaction volumes and unpredictable traffic patterns due to its multi-master architecture, which allows for faster processing and zero downtime. Couchbase Capella further enhances efficiency with time-based scaling, making it more effective than key-value stores for iGaming companies that require scalability and reliability at a lower cost. The text suggests Couchbase as a future-proof solution for managing high throughput and maintaining a responsive and reliable platform, contrasting it with MongoDB, which may not handle the same scale as efficiently.