are willing to assist new Xbox Live users and answer their questions. As of March 2009, there are ambassadors representing 18 countries in more than 30 languages. "Xbox Rewards" was a promotion designed to provide gamers incentives to play on Xbox Live by subsidizing achievement points earned with actual rewards. Gamers were required to register for specific challenges which, if successfully completed, would yield a challenge-specific reward. "Xbox Live Rewards" is a current promotion providing Xbox Live members with Reward Points (not to be confused with the defunct Microsoft Points) when they renew their Gold Membership, buy something on the Marketplace, etc. "Xbox Live Labs" was a program found in the community section and was available from March 10 to 27, 2011 for members in the United States. If a player chose to participate, they were rewarded with avatar items and 3 zero-point achievements. SentUAMessage was a show which aimed to answer questions sent in by viewers on anything related to the world of Xbox. The show ran for four series and was released every other Saturday. The show was driven entirely by user-generated questions. To ensure the volume of questions remained high, fans could contact the show in a variety of ways, including sending questions to the SentUAMessage Gamertag over Xbox LIVE, writing an email, or using social network websites. Security Microsoft implements a number of different security measures on its Xbox Live service. One of these takes the form of a proactive security check that assures that only unmodified machines may access their service. On May 17, 2007, Microsoft banned consoles with modified firmware from Xbox Live. According to Microsoft, consoles with firmware of unknown origin, quality or intent were banned permanently from Xbox Live. A Microsoft representative indicated that the action was taken to assure "the integrity of the service and protect our partners and users." It has been discovered that pretexting has been used to impersonate an Xbox Live user for sabotage. Microsoft has implemented greater security to decrease the service's susceptibility to social engineering. In early November 2009 Microsoft banned approximately 1 million consoles with modified firmware from Xbox Live. In October 2011, users of Xbox Live reported having unauthorized access to their Xbox Live accounts, with Microsoft points subsequently being used and/or bought to purchase various in-game items for FIFA 12. Microsoft is responding to such incidents by restricting access to the account for