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Re:The frequent fliers who flew too much by sachitgupta on Sunday May 06, 2012 @07:41PM (#3936841)
You can also use it to get frequent flier miles - a lot of cards offer 50,000+ miles on reaching a certain minimum purchase.

Here's someone who bought $15,000 in coins: http://advancedriskology.com/the-day-i-bought-15000/

Re:The frequent fliers who flew too much by saryant on Sunday May 06, 2012 @09:19PM (#3937120)
$15k is pretty small. I think there are some members of Flyertalk.com who managed to churn far more than that during the programs run.