Roblox Tickets, or “Tix” for short, was a premium currency introduced to the game in 2007, and which players could use for purchasing Robux in-game, among other things. Players could originally receive Tix through various means, including login bonuses, through the Ambassador Program, by selling clothing, and more.  However, as of April 2016, Tix have been discontinued, and the Currency Exchange feature along with it.