Very good points, I agree with the gist of your post, I just want to say, that, still you're not really buying it, but building it, through repeated interactions.
IMO it's down to arguing semantics about how "tight" is the causal chain between the cause and effect.
Do you perceive the cause (repeat buying) and its inevitable effect (caring) as sufficiently distinct in time and space? Then I guess you didn't buy the caring, you "built it through repeated interactions".
I personally see that boundary as mostly linguistic, and tend to not draw the distinction.