There is, in fact, evidence that 1. Amazon occasionally sells below cost (hence existence of CRaP products) 2. Amazon has pushed some vendors to 3p 3. Amazon

There is, in fact, evidence that 1. Amazon occasionally sells below cost (hence existence of CRaP products) 2. Amazon has pushed some vendors to 3p 3. Amazon directly or indirectly dictates allowable 3p prices The progression from Amazon selling at a loss to them pawning the product off to 3p sellers and taking a larger cut is reasonably argued in the source article to be harmful to consumer welfare.