I participated in this program a year or so ago. I received a box full of samples. It was very cool. They have it again! Go here to sign up!
These items are free. I haven’t been bombarded with emails, either. I did fill out a survey after I received the box, but I don’t think that’s mandatory.
Note: I have signed up, but I haven’t gotten the email yet to activate my account. That my be my issue as I’m having some computer problems, but I just wanted to give you a heads up!