How does the unique single-use discount code system in Growth Suite work? Does it mean customers can't share my codes on coupon sites?

I've been struggling with discount code management for months. Every time I create a public code, it gets shared on coupon sites, and suddenly my margins are getting eaten up by random people who weren't even my target customers. I've seen codes meant for a specific campaign end up on RetailMeNot or shared in random Facebook groups, completely destroying the strategic intent behind my promotions. My team and I have tried everything - manually generating codes, setting strict usage limits, but nothing seems foolproof. We need a system that creates unique, time-limited codes that can't be mass-distributed or shared indiscriminately. I want to reward genuine potential customers who are truly interested in my products, not just coupon hunters looking for the cheapest deal possible. The constant leakage of discount codes is killing our profitability, and I'm desperate for a solution that gives us more control and precision in how we offer discounts.