Sorry, largest in sales, i.e. overall volume.

Don't forget, people shop at Walmart for one reason, to save money. You know penny saved is a penny earned they say. People can buy anything at Walmart somewhere else at a higher pricepoint. They choose Walmart because Walmart knows how to reach out to an audience that wants to offer something at a lesser quality, but also at a lesser price. This is also why Walmart stocks their shelves with the same products under different brands and different price points i.e. tiers. The only company Walmart has to compete with is Walmart much like the AMA who has no competition, but struggling in memberships.

Unlike the AMA they don't have to worry about whether or not someone is or is not going to shop with them or not at all, they've dominated the market and know how to retain their residual income, with better/tiered prices and TONS of fluff. You know those little fluffy things like putting a McDonalds at the front door to feed your kids to keep them quiet while your shopping. It's very true that Walmart pisses people off, but for every person they piss off, 10 more join their "club". Nobody is forced to shop at Walmart, they just found the real secret to getting their shoppers, better prices. It's something the AMA is obviously catching on too.

Oh and people buy gas for one reason, they have too, that's Exxon/Mobils market strategy. It's one that seems to be working well within their niche too.

It's almost ignorant to say that people don't want to save money. The AMA doesn't hold enough "fluff factor" although they have good value. But there really is no "sugar on top" and a lower price is always the sugar customers will always bite on every time.