Why do you like to post a small note on the online shopping and refund one or two dollars?

I like to put a note on things I bought online and bring one or two back. Every time I sell a product, I get good reviews. The more I sell, the more favorable comments I get. Many buyers will read product reviews before buying. If they get a lot of praise, they will buy it, which can improve the comprehensive strength of the store and make the products more advanced. Cash-back of favorable comments can also prevent malicious bad reviews.