This is a decent idea, but not sure how it could work. I'm no mathematician, but it seems like you're dealing with an extremely large set of infinite fractions

This is a decent idea, but not sure how it could work. I'm no mathematician, but it seems like you're dealing with an extremely large set of infinite fractions, that might take some time to compute. For example, if I leave a 5 star review and there is one other review, 1 star, it would be 3 stars if we had the same weight. But if someone votes me 76% "taste score", and THEY have 50% weight, and I voted THEM 37% "taste score", then both of our votes affect each other. And this would happen for an cycle of reviewers reviewing other reviewers. Unless you meant only personal settings, in which case I think it would only work for niche audiences. There's a good chance that there's zero overlap between sets of reviewers on many products on Amazon except perhaps people who are chronically online, reviewing products. IMO those people's reviews are not as helpful as a person who leaves an occasional review, because in the latter case, the product stood out for some reason.