Dunkin Donuts is offering a FREE $5 Bonus when you reload $10 or more on your DDPerks Rewards Card using a Mastercard for a limited time. The $5 promotional bonus will be added to your account automatically after reload. Deal expires January 10, 2018. Auto Reload is not eligible for this bonus, disable and reload to get this offer. Reloads can be done through DDPerks site or through the Dunkin Donuts mobile App. If you are not a DDPerks member, It’s Free to join.