Reducing Transfer Bills at Massive Scale: Practical Comparison of Requester-Pays, CDNs, and Other Strategies

https://garrettwigp625.tearosediner.net/using-iam-policies-to-fix-storage-bottlenecks-and-scaling-pains-on-growing-platforms

When you operate systems that serve millions of requests per second, bandwidth is not an academic cost line - it becomes the single biggest operational risk