I'm hoping I am posting properly here.

I know that a lot of people aren't aware of Microsoft's fairly old expansion on to Xbox Live. This was a program designed to give members free Microsoft points for doing things they would normally do. Such as Purchasing Microsoft points, buying games, expansions, or avatar items on Xbox Live, renewing your Xbox Live Gold Subscription, etc. These activities can earn you free Microsoft points, though for some reason they decided to keep the program a secret instead of marketing it. I found it in a lucky Google Search.

All you need to do is sign in with your Xbox Live account info (email and password you used to make your Xbox Live Account). You are able to complete a four question survey once a month for a bonus 20 Microsoft points, and there are many other things like I listed above.

Here is a link and let me know if it helped you!

Xbox Live Rewards Program.