1) sign up at this website.
2) Confirm your email.
3) Go to prizes sections. Specifically the low cost rewards.
4) Order Dollar.
6)Receive and enjoy!
When you sign up they'll give you 250 free points. Which is convenient because the dollar is 100 points and shipping is 144. Aka you get a free dollar. Enjoy!
Just as seen on: http://freecreditsforfacebook.blogspot.com/2012/10/free-dollar-for-united-states-residents.html