Just bought an Oven Selects sandwich at McD's and they threw a survey thing in my bag. You fill it out online & they send you a $5 McD's giftcard in 3-4 weeks. YMMV depending on store I'm guessing.
Edit: Survey's done thru www.mcdsurvey.com (just directs to the people running it)...when u buy it they'll put a card with the exact page & password such as www.mcdsurvey.com/12345.html password MCD54321
Edit: Survey's done thru www.mcdsurvey.com (just directs to the people running it)...when u buy it they'll put a card with the exact page & password such as www.mcdsurvey.com/12345.html password MCD54321