If you manage many accounts and hit the same sites often, addresses from open lists fail on the first requests. A private IPv4 and SOCKS5 pool spreads requests across thousands of addresses. For multithreaded launches, people choose a rotating pool with spare threads. Details: https://telegra.ph/Buy-Rotating-Proxies-11-10 The pool keeps 12,000 to 15,000 addresses online. The list refreshes every 15 minutes and comes as a link. For Dedicated proxy servers the software connects right away.