I think it would be interesting to add "Like" feature to quizzes for members to show appreciation of the question. And when the quiz disappears send an automatic message to the creator of the question how many users liked their quiz question and how many members answered it. Or even do a monthly/quarterly digest of all the quiz questions from GM on DC and mention how many members answered / how many answered correctly / how many liked.
Thank you for submitting the idea. The status has been changed to "Future consideration".
Stay tuned!