Badge scanners give you a name and a company. A quiz gives you a person who chose to spend ninety seconds with your brand, told you what they struggle with, and ticked a consent box while doing it.
Nobody fills in a form at a stall for its own sake. They will, though, to get on a leaderboard with a prize at the end of the day. The registration step of the quiz is the form; the game is the reason to complete it. Exhibitors who gamify their stall report noticeably higher engagement and lead conversion than those relying on brochures and badge scans.
Add your own registration fields (role, city, budget range, product of interest) and an optional one-question survey after the quiz such as "What is your biggest challenge in this area?". Answers land in the same CSV row as the score, so sales sees context, not just a name.
Export a ranked CSV at any time, or let the top scorers' names on the final board do the follow-up for you: everyone who played gets a result email with your call-to-action button.