Starting with the basics: Amazon Verified is something the user might be conflating with Amazon Verified Reviews, which is an actual program where only people who have purchased a product can leave a review. But "Cruelamazons verified" sounds like it's either a parody or a fake version of that. Maybe someone is using "Cruelamazons" as a play on "Awww, Amazon" and adding "verified" to imply some kind of endorsement.