Originally Posted by
Smyrnaflyer
I'm guessing the OP is talking about a "No-hassle rewards" type of mileage, which involves the credit card company actually paying for the ticket. The advantage of this form of award travel is that it's not capacity controlled. However, the miles accrue at half the rate as, say, a Delta Platinum Amex.
Just to clarify (since there have been some confusions with this thread): half the rate of miles earned for the purchase price only. With DL Amex 2X the number of dollars spent will be earned. But the flight earned miles would be whatever the normal earning is for the fare class purchased. There are no blackout dates because the ticket is, well, just purchased. The "free flight" or discount is between the cardholder and the credit card. DL would be unaware of any perk and the miles earned for flying would be normal.