[mitchelldm7]

Exactly. Look at big box retailers -- Target and Walmart all give preferential treatment to manufacturers willing to sell at a discount or give special benefits to the retailer.

Better shelf placement, positioning near the front of the store, checkout placement ... All assets that retailers can exploit to woo vendors. Amazon is doing the same thing. Their assets are less tangible but offer just the same incentive to cooperate and play by their rules.

If you don't, you get pushed to the back of the store, placement out of eye level, etc.