Groupon has a nice deal for Dunkin Donuts lovers. Pay just $5 for a $10 Dunkin Donuts eGift Card.
Sadly, this offer is only only available to those who received an invitation, but you could still check I guess to see if you were targeted.
Limit 1 per person.
Also go through a shopping portal for your purchase. Ebates and BeFrugal have the best rates right now with 6% cash back for Groupon deals. For Discover card holders, Discover Deals is also offering 5% back so if you have the double cash back promo, you’ll still get 10%.