Old Aug 11, 15, 7:32 pm
  #10  
sdsearch
FlyerTalk Evangelist
 
Join Date: Jan 2005
Location: home = LAX
Posts: 25,133
As a number of airlines have invitation-only above-the-top-normal-level statuses (with unpublished qualification criteria), I would think those are truly the hardest to attain, since neither a known amount of spend nor a known amount of flying will guarantee those.
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