For heavy scraping and multithreaded jobs, free public lists go dead quickly. A set of private addresses with automatic rotation works where public addresses get blocked. So the scraper gets through the whole list, it makes sense to take a rotating pool with spare threads. Where to start: https://telegra.ph/Curl-HTTP-Proxy-10-26 The pool keeps 12,000 to 15,000 addresses online. You can also pay in crypto. For Proxies for ad verification setup stays simple.