When you run automation and data collection, public addresses from open lists hit captchas and bans fastest. A closed pool with SOCKS5 and HTTP works where public addresses get blocked. So the scraper gets through the whole list, people choose fast IPv4 and SOCKS5 proxies with spare threads. Details: https://telegra.ph/HTTP-Proxy-Service-11-10 Plans cover 1,000, 3,000 and 5,000 threads. The list refreshes every 15 minutes and comes as a link. For cheap proxy service the addresses go straight to work.