We handle 200x their request load on two Hetzner servers.

A profitable customer? How would Hetzner know if you're profitable or not?

I've hosted side projects on Hetzner for years and have never experienced anything like that. Do you have any references of projects to which it happened?

Because you are using an incredibly large amount of bandwidth for €30 a month.

They offer unlimited bandwidth with their dedicated servers under a “fair usage” policy.

The bandwidth costs would be higher than what you pay monthly, so they would simply drop you.

You are probably using very little bandwidth, so it doesn’t matter in your case.

However, I assume Jmail consumes a very large amount of bandwidth.

I have heard of hetzner terminating customer relationships if too many legal complaints are filed against your VPSes.

But not because of being "not a profitable customer". Mind sharing some links here?

I am not sure how one even gets 250TB/mo through a 1Gbps link. In any case, completely saturating your networking for the full month is outside most people's definition of "fair use".

Yeah but they still advertise with unlimited traffic. "All root servers have a dedicated 1 GBit uplink by default and with it unlimited traffic" https://docs.hetzner.com/robot/general/traffic/