Just focus on making high-quality quizzes. Good ones might get spotlighted, and then you can get subscribers. Having more subscribers increases the likelihood of spotlights. It's a slow process, though, and I had probably around 300 quizzes before I got much traction.
Sharing your quiz with people outside of JetPunk also helps too, which I feel is an undervalued method. I’ve gained hundreds of takes on some of my quizzes just by sharing them in the proper subreddits.