[cratermoon]

Rating systems online are generally skewed. Look at ebay or other marketplaces. Anything less than 95.5% favorable is treated as a problem or worse[1][2]. Look at restaurant ratings - 4 stars is not good. As best I can tell, there are really only two "true" ratings: good or bad. Part of the problem is that anytime a reviewer has a bad experience and comes away unsatisfied, they tend to go give a 1-star rating to "punish" the seller. The 5-star reviews typically only come from a. someone who had a memorably good experience and is very motivated to say so or b. fake. Someone who gets an "ordinary" experience in the transaction has little or no motivation to rate, so there's nothing in the middle.

A star rating system I know of that makes sense and is relatively uncontroversial is the independent groups like AAA hotel ratings, where the number of stars is more-or-less objective based on the amenities, making them more of a classification than a rating.

1. https://www.kenrockwell.com/tech/ebay/seller.htm

2. https://www.kenrockwell.com/tech/ebay/seller.htm