Xbox LIVE Rewards is a Microsoft program that started on December 1, 2010. Designed to give both casual and hardcore players incentives to play games on the Xbox 360. This works by giving the gamers Microsoft Points if they Renew their Gold-membership, buy special products in the Marketplace on Xbox Live. The program is expected to end June 30, 2012.
So check it out, just click HERE to go and sign up. So far I have gotten over 400 Microsoft Points.