I got the following via email:
Title: A New Gift Card Offer Just for You!
Purchase a $500 gift card and you'll get a $50 bonus gift card, or a $1,000 gift card and you'll get a bonus $100 gift card �" buy two $1,000 cards, get $200! Offer ends September 30.
Terms & Conditions:
*Order $500 in Holland America Line Gift Cards in a single transaction and receive a $50 Promotional ("bonus") gift card. Order $1,000 in Holland America Line Gift Cards in a single transaction and receive a $100 Promotional ("bonus") gift card. There is no limit on the number of gift cards a guest can purchase. Qualifying purchases must be composed of gift cards that each meet the qualifying threshold of $500 or $1,000 US Dollars.
Example:
Single $1,000 gift card = qualifies for $100 bonus
Multiple $1,000 gift card = qualifies for $100 bonus for each gift card
Single gift card worth greater than $1,000 = does not qualify for a bonus
*same applies to the $500 threshold
Offer is applicable to orders placed from 8/12/2020 6:00AM PDT to 9/30/2020 11:59PM PDT, while supplies last. Holland America Line reserves the right to terminate this promotion at any time.
All gift card purchases, and bonus gift cards will be denominated in USD. The Promotional gift card will be delivered to the recipient as a digital gift card only. No promo code is needed, and Promotional gift card will be automatically applied to the qualifying transaction. Promotional gift card expires on 12/31/2021.
Campaign ID: HEP2037MP2
https://www.hollandamerica.com/en_US/giftcard.html
