Below is a repost of opmnxtc post on FW:
ask for 1000 miles with any purchase.
you can do this every 30 days.
call same number above
ask for 500 miles for spending $50.
this is a replacement for the 5% CashBack Bonus with the Get More program.
you can do this every period the 5% CashBack Bonus is offered.
you can also go to the Discover website, click the 5% CashBack Bonus ad, click Log In and Sign Up, and enter your details. you will get a message stating that your card doesn't qualify for the 5% but that you can get 500 miles for $50 instead.