Yesterday I received the following email from Barclays about a promotion on my Barclaycard AAdvantage Red World Elite Mastercard...

You can earn 10,000 American Airlines miles for meeting a $2,250 spending requirement over the months of May, June, and July. That's kind of like earning 5x on everyday spending (12,250 miles earned total / $2,250 = 5.44)

Granted, it's 5x on American Airlines miles which we value a little lower than typical legacy carrier miles due to lack of SAAver level award space.