Those events may just be seasonal. Call the store directly.
At Summerlin I have seen them there many times.
They always have some sort of promotion going. Talk with them in the store and they will give you the latest information.
I personally don't know.
Yes when the direct TV team is there.
Yes, you just have to catch them when they are there.
I wish I had an answer, but I don't. I would suggest you call Costco and ask
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