I don't use private proxies (I hate monthly fees!)
When I tried using my own IP, I got blocked by search engines within several hours (although I picked many search engines and also put a 180 seconds delay between searches).
So I am using public proxies.
How does the scraping of public proxies work ? -- is it completely automatic and I just need to check that I want it and it will work, or do I need to go to the proxy list from time to time and to verify the hundred of thousands of proxies ?
My question is - is the finding and filtering of bad proxies fully automatic ?