A 200 response is not proof that a proxy setup works

A residential proxy setup can look “fine” in testing and still fail in production. A 200 response does not tell you: whether the page is challenged whether the geo is correct whether retries are already too expensive whether the session survives long enough for real workflows For scraping, I think “cost per successful usable page” is often a better metric than cost per GB. What are you measuring first when validating a proxy pool?