[proto_lambda]

At that level, there is no reason to proxy it through a different IP address. If you control the network, you can just make the packets come from the original, real address.

[H8crilA]

It was probably written by junior devs, like most other software around the world.

[slt2021]

GFW that can inspect petabytes of traffic per second for 1.4 bln population cannot be written by juniors

[dizhn]

It might be something government mandated where all ISPs direct mail traffic to a central location. (The largest ISP is the government by the way)