I believe they do
No they don’t. You may look around but not buy anything unless a member
No. But there are certain things that you can buy without being a member, depending on the state laws, such as alcohol, health services, and prescriptions, and you can shop Costco online without a membership (prices and availability are not identical).
I don't think so. Why would they? The accounting and time loss would be prohibitive.
No
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