This is the only GPT site I have found that really does work. All you need to do is join, confirm your account, and complete offers. In less than a week, I got Katamari Damacy and 1600 MS points shipped to me from amazon.com

The site will order your prize from amazon, ensuring a speedy and well-handled delivery.

You can also use their sister site, Cashle, and earn cash for paypal or have a check shipped to you.

If you are interested, go here:
http://mainpoints2shopcom.tk/

The fastest offers are the quiz rocket ones, you can get them to credit in an instant!
This is all free, and by verifying you get 250 points ($2.50) just to get started.

Want to see proof? My proof and offer-completion guide are here:
http://www.youtube.com/watch?v=YWpvuqABqFk

Hope you like it!