For heavy scraping and multithreaded jobs, addresses from open lists fail on the first requests. A private IPv4 and SOCKS5 pool works where public addresses get blocked. For tasks like these, people choose fast IPv4 and SOCKS5 proxies with spare threads. Where to start: Dedicated proxy servers The pool keeps 12,000 to 15,000 addresses online. Traffic is not billed by the gigabyte. For Buy proxies setup stays simple.