I'm not surprised they supported the first one for so long, they are trying to build up the brand before moving on to a sequel. Also keep in mind this game was in development for 7 years! You don't just crank out a game with a map this size in two years, it takes time. TDU was released in 2006 and shortly after that, key people on that team left Eden games to create the Ivory Towers studio. Development of the crew started in 2007 and the game was released in 2014. Now the question is do they just keep expanding TC or release a sequel. This game has over 5 million copies sold.