The main reason is that the review rate is too high during the evaluation. This is normal. No buyer will leave 100% of reviews for the product they purchase. This is a normal purchase situation. As the world's largest e-commerce platform, Amazon has a lot of data. The system can calculate the approximate review rate of a real buyer account. When the review rate exceeds the normal range, it may be included in the risk control, which will limit the buyer's account's review rights. This problem is not unsolvable. You can dilute the review rate by accepting auction orders and review-free orders. The simplest way is to alternate between leaving and waiving reviews.