Gamers that subscribe to the Xbox newsletter from xbox.com recently received an ad offering 400 microsoft points for purchasing the newest Grand Theft Auto IV expansion, The Ballad of Gay Tony.  Seeing as the expansion is usually $20, $5 back makes the purchase more than justified for a great title like this. The deal also works for GTA’s previous expansion, The Lost and the Damned.  To take advantage of this deal just head over to the Xbox Live Marketplace and purchase the content. The points should be added to your gamertag within 4-6 weeks after your purchase.