That's the trick where the seller replaces a good product's
name, description and picture, which effectively transfers all
existing(positive) reviews to a different product. Which only
shows how many people don't look at a single review if the score
is good enough.
The other trick that Amazon doesn't give a damn about is using
the mechanism meant for different product colors and sizes to
combine multiple products into a shared entry, which mixes all
the reviews together and makes it basically impossible for the
customer to see the score for each individual item.
As far as I can tell Amazon's only reaction was to start banning
customers who returned too many products. I wonder why.
Steam has done something smart here by displaying both the total score and a recent trend score, so you can see if recent changes has made the game better or worse.
