ball_biscuit

I don't think you can use Cloudfront to serve that kind of traffic. Cloudfront costs are described here: https://aws.amazon.com/cloudfront/pricing/

So for 10k HTTPS requests, the price is 0.01 $. If you serve 5 billion per day, that is 5000$ a day. With such high traffic I believe it is needed to handle it using performant webservers (Go, Erlang?) to keep costs reasonable, and probably terminating SSL at load balancer is the way to go