Yes
Yes you need to be a member. However they have different levels of membership which get Rewards that will pay for your membership costs
They will let you buy there, but they jack up the prices for non-members.
Yes you have to be a member. There are different levels of membership
Yes you do. If you purchase enough through the year, you get enough "cash back bonus" to cover the cost of your yearly renewal, so you really only have to pay the membership fee once.
Yes you do
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