Is there a plausible explanation why egress fees from cloud providers costs around $0.1/GB? "Traditional" server providers such as Hetzner are able to offer bandwidth at orders of magnitude lower price (eg. $1.1/TB). I understand that cloud providers may have better interconnects or better uptimes, but that doesn't justify the magnitudes higher pricing.
I doubt that you'll find you can consistently push or pull 1Gbps from a Hetzner server. I certainly can't. --That's not to say that they're a bad deal, but their total bandwidth is nowhere near what the major cloud providers can give you.
I've always got full 1Gbps out of Hetzner, even across the ocean, and for periods of multiple days of transfers.
(Like on all machines, you need to set the right TCP settings for windows sizes to make it physically possible.)