Great article by Pittsburgh Business Group on Health that explains the PBM rebate scam.
Above board discounts and rebates would not cause problems. Let’s say your friend had a coupon for $10 off when you bought two entrees. The price of the lunch would go from $40 to $30, and you would each pay $15. With the undisclosed rebate, however, you don’t get the benefit of the discount or rebate. All of the benefit goes to your friend (Your friend pays $10, you pay $20).”