Amazon Review Card

Background: In order to increase the rate of positive reviews, we usually use a variety of methods including but not limited to fake orders and posting cards, among which cards are one of the conventional methods. Posting cards/illegal content on instructions are all violations of Amazon policies. As a miserable operator, how can we reduce the risk? Share the following ways:

Main principles:
①Avoid asking for positive reviews directly
②Increase the difficulty of Amazon unpacking inspection
③According to the account's past performance
④Reliable service provider
 
Main operating methods:
① Don’t directly say that only good reviews can be exchanged for gifts/extended warranty and other benefits. Encourage replies instead of encouraging replies of good reviews.
(Some naive buyers will actually reply to bad reviews and ask for gifts, so be prepared)
② Scratch-off tickets, puzzles, plastic wrapping, redirecting content to after-sales websites, and only attaching QR codes increase the difficulty of Amazon unpacking inspections
③ If you place a follow-up link to a small account, do not place it again after being caught with a large account.
④ This depends on fate, department accumulation and company resources.

Summarize:
Is there a completely safe way? If there is, it would be too much to underestimate a listed company with a market value of trillions of dollars. All we can do is try our best to reduce the risk.
I personally recommend posting cards with QR codes in them. The QR codes redirect to after-sales service websites. The after-sales website has professional customer service to solve problems and then hint at a series of operations such as asking for reviews. So far, I have not heard of any warning letters for manipulating reviews.