Well, we obviously have the T&C, but those aren't saying much about this situation. There is no language in it regarding the retail rate being charged, as some quoted above from their own offers. Not that they'd get with a blind charge in Europe anyway, they'd have to tell the passengers in advance.
GENERAL FREE DEAL TERMS (APPLICABLE TO ANY/ALL AVAILABLE MATCH PROGRAM FREE DEALS (“DEAL(S)”)) Free Deals exclude any deposit and Taxes, Fees, and Port Expenses (“TFPE”). The promotional offer is applicable for 1st/2nd guests only; 3rd/4th/5th guests are responsible for prevailing cruise rates. Holland America Line reserves the right to assess a change fee according to the date of the request, the length of the cruise, and the actual cruise sail date. Cancellation penalties apply. Must be 18+ to play in the casino. Invited Guests under the age of 21 must travel with a relative or guardian of 25 years of age or older. Exclusions may apply to certain Deals. Deals (and any parts) are not transferable, not substitutable, not redeemable for cash and not combinable with any other offer/deal. Deals are only applicable to new bookings, on select sailings, and are capacity controlled (regardless of stateroom availability). Each Deal is only available on select sailings through the date set forth in the Deal’s specific terms. Free Play offers are only valid for the first two guests in the stateroom. Carnival Corporation (“Carnival”) is not responsible or liable for any printing errors. Any Deal may be changed or revoked at any time. Guests must be eligible for passage on Holland America Line ships to be eligible for these Deals. There is no guarantee of availability at time of booking. © 2022 Carnival Corporation. All rights reserved. Ship Registry: The Netherlands.