I don't think anyone or a single person can rank a website's ratings or reviews based on an algorithm or script used by a casino because as far as I know, most casinos are closed source. Furthermore, in all of GamblingBro's reviews, he primarily based his score ratings on many criteria like RTP, Deposit and Withdrawal restrictions, KYC, VPN, Bonuses and Rewards, and so on.

Personally, I always check his website[1] whenever a new gambling site is mentioned in this topic to see if there are any red flags to be aware of before making a deposit.

[1] https://gamblingbro.com/