Matt Dusek has the Inviter Badge listed twice on his profile.
The Inviter Badge was retired on October 14, 2013. It will continue to show on users' profiles even after it is retired.
Original: Robloxia is a vast uncharted realm, as large as the imagination. Individuals who invite others to join in the effort of mapping this mysterious region are honored in Robloxian society. Citizens who successfully recruit three or more fellow explorers via the Share Roblox with a Friend mechanism are awarded with this badge.
Current: This badge was awarded during the Inviter Program, which ran from 2009 to 2013. It has been retired and is no longer attainable.