One thing people pointed out is minimizing egress fees. You do that by using CloudFlare, fastly, or another CDN. You can get bandwidth costs down to < .001/gb

One thing people pointed out is minimizing egress fees. You do that by using CloudFlare, fastly, or another CDN. You can get bandwidth costs down to < .001/gb by committing to $1500/mo in bandwidth. The CDNs will pull from S3 once, then cache it forever (assuming you do it right).