i saw this counter too,there are 3 computers for walk-in ppl to join member.But not many ppl join member,bcos seem ODD.
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i don't see they distribute any 福袋.
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Besides,same counter,if you buy Umagazine (seems HK$12),you can got a FREE bottle 500ml green tea and/or a FREE cup noodle.
http://www.umagazine.com.hk/