The weight of verified reviews is greater in determining the overall star rating.
For example, consider two products, both having a total of 100 5-star reviews each:
Product A has 75 fake, non-verified 5-star reviews and 25 real, verified 5-star reviews, making a total of 100 reviews.
Product B, on the other hand, has 100 real, verified 5-star reviews.
Now, suppose both products receive a certain number of negative reviews (let's say X). In this scenario, Product A's overall star rating will drop more significantly compared to Product B because only 25 of its 5-star reviews are verified, whereas Product B has 100 verified 5-star reviews. Since verified reviews carry more weight, Product B's rating will be more resilient even if a few people leave negative reviews.
In summary, verified reviews play a crucial role in determining the overall star rating of a product, and products with a higher proportion of verified positive reviews are likely to maintain a better rating, even in the face of negative feedback.
I believe that some Chinese people might indeed get caught, but I would wager that the ratio of those apprehended compared to those who go unnoticed is quite low.