For software that opens dozens of threads at once, free public lists go dead quickly. An IPv4 pool with rotation works where public addresses get blocked. For multithreaded launches, it makes sense to take a rotating pool with spare threads. Where to start: https://telegra.ph/Odds-Scraper-10-28 The pool keeps 12,000 to 15,000 addresses online. The list refreshes every 15 minutes and comes as a link. For Proxies for SEO tools GSA checker the pool runs from the first launch.