We ran over 400 tests in the last 48 hours to be able to determine the pattern. Yes, G00gle has the stronger bot/proxy detection right now based on various access types (search, special commands, etc.).
Results: (Cliff notes version)
- My "test" private proxies are PERM-blocked by G00gle after using the special commands 3 times or more. When it happens (failed captcha entry), that IP is BLOCKED for good, only with a link to contact G00gle if you want to request to unblock IP (it will be very difficult). It happens if you have the same subnet IP block for the test. Fortunately these test IPs I have are junk anyway.
- My test "G00gle" proxies from proxylist.co/webproxylist.com have less chance of blocking due to the real mix of subnets (almost all of them are unique) when running the G00gle commands/basic searches. In other words, better results, due to large number of tested G00gle proxies from my system available.
It looks like the private proxy providers need to raise $$$ to charge the customers for the private proxies, plus, they need to require the customer to order large # of proxies, and would need to change the way they operate the business in order to protect their IPv4 private proxies. If the customer caused these IPs to be banned by G00gle, they (not private proxy providers) need to pay for the replacement costs. If the private proxy providers don't, they will be digging their own grave big time due to the dead/useless IPs.