[NewUser76312]

Costco doesn't seem to be like a monopoly, broadly speaking they compete with many grocery stores and bulk food outlets. That being said they often have solid inventory, and the samples used to be a nice touch until all my local locations got way too crowded.

[fragmede]

Who else competes in that specific market though? Sam's Club and Smart-and-Final are the two I can think of, and it's been a while since I've seen either one of those. Oh, and actual restaurant supply stores, but those are different, imo. Costco's not directly competing with Safeway, for example, as they are different parts of the market.

[toomuchtodo]

Can you provide some examples of monopolies for context in this discussion?