I have extracted about 25 million URLs with ScrapeBox' Link Extractor. ScrapeBox' Backlink Checker 2 is way to slow, to be honest - 1 URL per 10 seconds with a MozScape account. I also tried scraping from Google with the each URL in quotes, like "URL", and my proxies get banned with 1 connection and 15 seconds delay between each query. I have about 50 semi-dedicated proxies. And a good dedicated server with a 1 Gbps connection. What would be the fastest way to extract the backlinks of those?