In general, query growth is relatively slow (Google already does >100B queries per month), but Google continues to show ads on more queries and optimize the click through rate and cost per click which continues to drive 30%+ revenue growth.
Consider your own product. Is it fun, even without a goal? Does it indulge moments of playful exploration? Does it create moments of pleasant surprise? If so, congratulations because then you have a toy and you're on the way to building a great game.