This is an awesome article but if your egress costs are so high that you're deciding which HTTP headers to exclude, you should probably be moving to an unmetered bandwidth provider, or at least one that charges a reasonable amount for egress.
popular unmetered options: he.net, ovh, hetzner - You generally lose a lot of the "cloud" capability with these options however.
cloud options: digital ocean egress is $0.01/GB ($0.005/GB if you buy it via droplets), linode is $0.02/GB, vultr is $0.01/GB, etc.
[1] https://www.techempower.com/benchmarks/#section=data-r18&hw=...
10 Gbps fully saturated delivers about 3300TB for that $1-2k/mo, versus the $22k/mo you'd pay AWS for the same.
I'm absolutely not talking about the "unlimited bandwdith" bullshit that discount hosts offer.
[1] https://www.cloudflare.com/case-studies/di-fm-eliminates-egr...