Groupon: FREE Dunkin Donuts (cash back) up to $3

Groupon has a great offer for a limited time… is FREE meaning 100% cash back..

How does this deal work

You can take advantage of this offer by linking your credit card for free, once you get that set up the next thing you can do is swipe your card at Dunkin’ Donuts. Get up to $3 cash back on your credit statement.

They had this offer a few months back which I did tried it and it deducted the amount spent right away..