| http://www.w3.org/ns/prov#value | - He said that it came down to one thing: The benefits of allowing miles to expire no longer outweighed the inconvenience to passengers. ???After discussions with our customers through surveys and focus groups, it was apparent that they view their miles as a form of currency,??? he says. ???The breakage of these miles was of minimal gain to Delta, but eliminating expiration was a big win for custome
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