I saw that in my email this morning. Be sure to note the fine print...
"This certificate expires at the end of the 2021 Season (October 2021). The certificate can be applied to any 2021 Daily Excursion trip. This excludes all special trains, Galloping Geese, or 50th Anniversary trains. Use for Coach class is for the entire season. Use for Premium class is limited to the regular season from Opening day (TBD) through 9/9/21. Blackout dates for Premium class are 9/10/21 through the last day of the season. Certificate can also be used for Cumbres and Toltec merchandise. Cannot be combined with other promotions or discounts. All classes are subject to availability. Rain-checks will not be given on trips booked with this offer. This Gift Certificate in non-refundable and non-transferable."