It works because it's a global based concept, people who come and go to visit WDW esp they happen to travel there from all over the world
, Disney's design when it comes to Downtown Disney and now Disney Spring's expansion of offerings are still to be internationally-known, or significations orignially established from other major US cities. What you will find mostly except along the line a few things you might still find at let's say Florida Mall or Mall at Millenia, they are still international establishments. DIsney World on it's own is a showcase to the world, and the people who would travel only to find it there, will be willing to spend for the things they can't otherwise somewhere else where they come from this is where foreigners and American's who want international aclaimed appeal will suceed and buy.x
As for the rest, you can still by when your at Disney Springs, there are plenty of other stores I'm sure that will suit you to your flavor and budget & still go enjoy to go have a look even if you can't buy just discover what the significants they offer as pleasurable delights for it's people.*