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Old May 5, 17, 6:43 pm
  #15  
Often1
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Join Date: Aug 2010
Location: DCA
Programs: UA US CO AA DL FL
Posts: 50,169
I always tip according to local custom, e.g., always in the US. Doesn't matter whether the drink is paid for, free or a voucher.

You don't need to rationalize not tipping. If you don't want to, don't. It's cheap, but you don't have to, so don't.
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