I kept getting calls every hour on hour 12/3 after filling out a survey for coupons online the night before. When I answered no one was there, called back got a voicemail but no information was on it just a pre-recorded voice. Don't know but I am very unhappy that this happened all day today.
I too completed a survey for coupons (NEVER again) and have received phone calls ever since. I do not answer them as they are all out of state calls. As soon as I add the number to my "reject call" list, another number starts calling me. Very annoying!