have you looked at amazon product reviews recently ? while this particular approach (locking reviews at the outset) may not be the best approach, i would LOVE to see companies put some more effort into combating review "fraud" either by verifying watch time or restricting reviews per ip including captcha etc etc the exact same stuff that any social media platform needs to do to combat spam because for me personally reviews on the internet have lost almost all value as they no longer represent a collection of human opinions where each person gets only one review