The more of those centers they build, the more business they can pick up by doing fulfillment for small businesses. One thing they’re going to have to work on, though, is some means of limiting the number of vendors for a particular product. I regularly buy things like audio cables, and find myself having to flip through page after page of the exact same cable to find the cheap one.
monoprice.com
its very very rare I find them for less on amazon.