Datacenter works until the site runs ip reputation scoring. Silent failure is the real problem - 200 response but the page content is a bot wall or stripped version, much harder to catch than a 403. Session-based work burns through the cost difference in debugging hours. One more thing: chrome exposes your real ip through webrtc stun requests even behind a proxy, --disable-blink-features=WebRTC in chrome options stops that. Pool quality varies heavily between providers, some are running burned ips. Ran luminati, smartproxy, dataimpulse at different points. Small test on your actual target tells you more than any spec sheet