A special alphanumeric string, when applied during the purchase process for admission tickets to model railroad exhibitions, reduces the overall cost. For instance, entering a series of characters at checkout online or presenting a physical document at the ticket counter can unlock a discount.
This cost-saving mechanism provides an avenue for enthusiasts, families, and collectors to access these events at a more affordable price. Historically, these promotions have served to broaden attendance, stimulate sales for vendors, and ultimately foster a larger community surrounding the hobby.