Earlier quoted context omitted.
I think most people don't know that shelf space is actively sold by the stores. They imagine the stores go out and find the best products to display. That's not what happens.
That's not always true. I don't think it would matter how much Amazon money offered Apple, they aren't going to install an Echo end cap.
The relevant thing to consider is that Apple likely wouldn't do it for an amount of money that was anything resembling a good deal for Amazon.