In 2022 I got physical mail about leaving a review for something I bought from Amazon (sold by company X, shipped by Amazon) in exchange for Amazon Gift Card. It contained the name of the product I bought. When I tried to report it to Amazon:

* there was no obvious way to do it. Closest thing was by reporting issue on product.

* there was no way to show the customer service agent a picture of the mail. Chat did not support sending pictures & they were unable to open imgur link.

* agent recommended me to leave a report it by leaving review to the seller page. I did that and next day review was deleted.

So it's pretty clear that Amazon didn't care and I doubt it has changed (unless the law you are talking about is recent one).

Yep -- I've gotten multiple postcards in the mail and/or product box after ordering something telling me I'd get ~$5-$10 if I left a 5 star review. They thoughtfully included exact screenshots of how to submit the review.

I also went looking for a way to report it. Eventually opened up a chat, didn't really get anywhere.

(I also didn't appreciate getting junk mail for ordering something).