I'd disagree with it as well. Over here in the UK, shops like Poundland and Poundstretcher are doing a booming trade, even in areas with both wealthier populations and a ton of retail options in general. Same goes with cheaper supermarkets too, with the likes of Aldi and Lidl opening up a lot more shops now than they did in the past and gaining a much larger share of the market than the established brands.

It's not just those with few options. It's a general shift towards extremely cheap goods in general, which seems to often be true regardless of the amount of options in the area or the demographics of the folks that live there.