TracesOfArsenic
macrumors 65816
Does Walmart give preference to the store brand products. Yes they do. It would be stupid on their part not to.
I agree with you on the example you gave but the AppStore has a little more nuance than that. Apple set very strict guidelines that restrict what you can or can't do with the product you can put on their shelves, yet they don't apply those same rules to their own. So it's not just a business agreement of it being on the shelf but an agreement on what that product is allowed to do or how powerful it can be (i.e. it's function) in the first place.
For what it's worth I don't think anything will come of this but it's always been an unfair advantage as a developer to have Apple do something that you were told you weren't allowed to do and then taking sales away from you on that very fact.