Normally, you get a 14-day free trial. Politely ask for a 30-day extended trial. This isn't a promo code, but it gives you an extra two weeks of free management while you save up for the subscription.
FIZ integrates with payment gateways. If you switch your merchant processing to their preferred partner, they sometimes discount the software fee by 1-2% (effectively a hidden promo). fiz brewery management promo codes