Dude, as someone that worked, briefly, in retail at a corporate level, the agreements between the major players like Coke and Pepsi and the big boxes are like some Van Halen “no brown M&Ms” level shit on both sides of the equation.

I have seen emails describing what happens when a coke representative walks into one of those stores and finds that their product is not merchandised within X feet of X aisle or is out of stock on the shelf and there are serious financial sanctions for that shit. Something is minor as a customer setting a 12 pack of 7-Up on top of the stack of Sprite has gotten escalated to levels that would be ludicrous to a layman.

Everything, every single shelf or peghook or rack in that store, has a dollar amount attached to it, and the sums of money being exchanged over whether your product is placed at eye level or down on the bottom shelf is unreal.