Dishonest Marketing Research

I received the following 'research survey' in the mail yesterday asking me about my child's feeding habits.  It seemed heavily focused on formula and I grew suspicious completing it, so I researched NIIN and learned they are a front for the formula company Similac.  I'm sure I was chosen to participate because I haven't used one of their coupons (we EBF and even when we supplemented, we used the samples the pediatrician gave and didn't have to buy any).