Well if your going to spend Microsoft Points at the Xbox Marketplace you may as well get a little in return right?

Xbox has a great deal to help you you to kick off the holiday season. Just spend 1600 Microsoft Points on selected offerings from Microsoft Game Studios (see the list below) between November 16 – November 22 and receive 400 Microsoft Points–FREE!

After registering and spending 1600 Microsoft Points on eligible downloads during the promotional period, the free Points will be either be deposited automatically into your Xbox LIVE account or sent to your e-mail via a token. Please allow four weeks for delivery, on or around December 20, 2010.

There is an entire list of the eligible download content on the offer page listed above.  If your going to do this hurry though as it wraps up on 22 November 2010.