1) Dunkin’ Donuts has a rewards app called DD Perks. They launched a referral program–sign up with a referral link, and both parties get a free drink of any size! Unfortunately, there is no set referral link per user–instead, you have to supply your friends’ email addresses and DD will email them customized links.
If you’d like a referral, simply comment or email me at hello[at]freefoodguy.com asking for one and I’ll send you a referral link right away! Otherwise, you can create an account at www.ddperks.com or download the app for iOS and Android.
2) DD Perks also gives you a free any-size drink on your “birthday”! Be sure to set your birthday for at least a week after you sign up for the app–many rewards programs won’t give birthday coupons for dates close to sign up.
3) They are also currently running a promotion for users of the app: buy any food item, and get a coupon for a free drink loaded onto the app. Naturally, I bought a single munchkin (donut hole) for 25¢ –which is enough to get the coupon!