To be sure, Carnival gift cards aren’t the only cruise line gift cards you can buy on sale. As an example, Royal Caribbean and Celebrity gift cards were recently offered through AARP for a 10% ...

The Carnival® World Mastercard® is a co-branded travel rewards credit card designed for people who frequently travel with Carnival Cruise Lines and other World’s Leading Cruise Lines brands.

AARP offered Carnival Cruise Line gift cards at a discounted price, but that offer was pulled earlier this year. On the day of this writing (March 18), Newegg started selling $500 Carnival gift ...