It’s not a problem to join a festivity. The Royal House’s publicity department maintains the position that you can only congratulate or jubilate the Royal House. Making a commercial link is not allowed, but in practice that concept is flexible. The face used has recognizable features of our King. Celebrities basically have a popularity that can be monetarized. However, for politicians heads of state (including and Royals Family members ) it is assumed that they do not monetarize their popularity.
There is little case law on the use of photos and names of members of the Royal Family in advertising. A hook, not aimed at direct sales, is therefore fine. Especially if there is a wink and no suggestion is made that the person takes part of it. Source image: TicketSwap
