Not sure if it's the same in the US but in Canada the convenience store is already inherently an upscale destination because of how much more everything costs compared to a supermarket.
Not sure about Canada, but in the US all convenience stores I've been to (except Amazon) sell a very narrow subset of goods found in a supermarket: mostly shitfood, cigarettes, booze and lottery tickets, maybe a small shelf with emergency supplies or a brown-looking banana. This attracts the type of crowd that enjoys consuming these goods.
Amazon, as I agree with the parent, was neither here nor there, not as well stocked as the CVS, and too weird/too hip for a 7-11.
