There is a new site out.
Xbox 360 Forum Rewards
All you do is post on a forums, just like here at gamebattles, except each post you make, you get a Credit. 100 Post = 100 Credits.
Once you get enough credits, you can then exchange them for 1600 MSP Codes, 4000 MSP Codes, MLG Credits, and much more.
Here is some info:
MyForum rewards is a site that rewards users for being active on the forums. We want to start an active community, and feel the best way to do this is have an incentive for our users.
Our forum is Coded to give users a
Credit for every post they make, and thread created. The more you post, the more credits you receive. With the credits, you can purchase items from the Forum Store.
Items in the forum store range from: 
And Much more!
