Does AWS (and GCP and Azure) not do the exact same thing when transferring data out via Cloudfront (or their respective CDN)? Is Backblaze really special in that regard?
(backblaze ceo here)
AWS is free to Cloudfront because that's an AWS service.
AWS/GCP/Azure are not free (and quite expensive) to Cloudflare.
Backblaze is free to Cloudflare.