Why not? That can be construed as abusing their 'monopoly' over shelf space and foot traffic, it's unfair competition that displaces other legitimate businesses

Why not? That can be construed as abusing their 'monopoly' over shelf space and foot traffic, it's unfair competition that displaces other legitimate businesses. Incidentally, in the Netherlands a lot of supermarkets stock a 'shared house brand' called Gwoon. Usually the cheapest option by far and decent quality. I don't know what they do to keep prices as low as actual house brands, but it seems possible.