Right, and Walmart only allows products in its store under their terms which is far more restrictive, so I'm failing to understand how this model is
worse for competition than Walmart's.
And what happened with PopSockets didn't quite work that way. They were already a vendor on Amazon, and they wanted to remove themselves as a direct vendor and designate a single reseller as their "approved" FBA on Amazon.
So they wanted to change the terms of the agreement, Amazon said no, and that was that.