1. Go into Scrapebox and search this custom footprint:
filetype: txt inurl: proxy OR inurl: proxies OR inurl: proxylist OR inurl: proxieslist
this will return hundreds of proxy lists.
edit: delete the spaces after the colons. I had to put them there so emoticons don't show
2. Under export URL's, select "copy all urls to clipboard"
3. Go to manage proxies, harvest proxies, add source and select "from the clipboard." Click start. Scrapebox will show you how many proxies it finds at each URL. The results will probably total around ~500,000.
4. Delete all the lists that have less than 100 proxies.
5. Start testing. DO NOT TEST ALL AT ONCE. Testing 500,000 proxies will take days.
Using this method (and setting my connections to 200 in the Scrapebox.ini file) I typically find 75-100 proxies in 5-10 minutes.
Hope this helps.
Chuck