According to this post from Terry in an old thread, the single questions were meant to show up in the hourly games:
All questions rated at least 0 go into the general pool, and appear based on their difficulty:
Roughly:
Easy Game: 85% - 99%
Smartest: 70% - 95%
Daily / Team / KO / Mixed Hourly: 75% - 95%
Obscurity: 20% - 60%
Impossible: 0% - 60%
http://www.funtrivia.com/forums/ubbthreads.php/forums/2/3/FeedbackBUT... as someone else posted, I have not seen the QQ questions appear in either Easy or Smartest.
And nothing is said about the quizbot mixes.
Does "Impossible" mean the Gold Madness game? If so, then this would contradict the blurb on the home page, as looney_tunes pointed out, that states that the questions come from new quizzes.
So, perhaps Terry could jump in and clarify?