If you manage many accounts and hit the same sites often, free public lists go dead quickly. An IPv4 pool with rotation 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: Сheap private proxies Plans cover 1,000, 3,000 and 5,000 threads. Traffic is not billed by the gigabyte. For Fast rotation proxy the software connects right away.