hanakuso

Wouldn’t it be funny if the same residential proxies allowing these labs to scrape the Internet is also what’s enabling these resellers?

Almost certainly, but I cannot confirm without benchmarks.

HTTP1/2 = TCP, which has dedicated hardware to offload major parts of the protocol overhead.

QUIC = UDP, but re-implements some features of TCP in software, leaving the CPU to handle things it didn't have to before.