FYI - Here's part of the T&C of the Capital One No Hassle credit card offer that I just received:
Cost of Travel=Number of No Hassle Miles needed
Up to $150 = 15,000 miles
$150.01 to $350 = 35,000 miles
$350.01 to $600 = 60,000 miles
$600.01 and greater = the cost of travel X 100
(Sorry it didn't post in columns.

)
Remember an airline FFP requires 25,000 miles for a ticket (if you can find a "saver" award) or 50,000 miles for any available seat. With this card, you would probably need either 35,000 "miles" or 60,000 "miles" (or more!

) for the same seat!