I purchased an item last year, found it to be unsuited to my application, and posted a mildly negative review which essentially stated that the item was not as suited for the application as the manufacturers had claimed. Since that time I have gotten 2-3 emails per day from the vendor begging me to remove the review, and offering to reimburse the purchase cost and even add a bonus payment. I've ignored them all but they keep coming. My email was not associated with the purchase, but apparently there are tools vendors can use to match a review to an email address.