Great part of my bill comes also from the amount of HTTP requests to my buckets and having to download and analise the shitty CSV from AWS billing reports is a real pain. Not saying storage is useless, but that it would be nice to have a tool that covers all these parts of what the billing is about without the monthly hassle.
Putting https://netlify.com over S3 works well for me. With their URL rewriting feature it basically works like CloudFront but with included bandwidth and no per-request billing.