If you have a child who wears size 4 diapers, you'll want to get in on this. I saw this mentioned last month, but I wanted to make sure it was legitimate before I posted it. I have heard a lot of positive feedback from those who participated last month, so I decided to go ahead and mention this.
Call Arquest at 1-888-342-7372. Use extentsion 646 if you have a girl; 634 if you have a boy. They will send you a box of diapers along with a survey. You use the diapers until they are gone, and fill out the survey. They will schedule a time to call you and you will read the answers to your survey to them. They will then mail you a $10 check.
I just called and spoke to the lady, and my diapers should be arriving August 28.