 Despite early success , the series , along with the overall rhythm game genre , suffered from poor sales starting in 2009 . Activision had stated in early 2011 that the series was on hiatus for 2011 , while a seventh main title in the series was under development ; this title was later cancelled due to the poor quality of the emerging product . Activision later shut down sales of the series ' downloadable content , although users who purchased material from it previously may still play what they bought . 
