1.   And like other sought-after collectibles, they have attracted droves of the obsessed who think nothing of going an extra mile to get a mile.

2.   Advanta cardholders must spend ten dollars to get a frequent flyer mile on the Advanta card, while American Express cardholders get a mile for each dollar.

3.   I put it on my Mastercard and rationalized that we were getting miles.

4.   If you treat it really well you can get more miles, if you treat it poorly you get less.

5.   The airlines split the revenue, and the passenger chooses which frequent-flier program will get the miles.

6.   Those who do not want the free ticket can get double miles instead.