Originally Posted by
theOtherHolmes
You cannot always get what you want. The key is to read the fine print when you make a choice. If you read the fine print, you’d know the selection is final.
It's a lot more than fine print. On this occasion, Marriott and its T&Cs are very much in the clear.
The online process to select your Annual Choice gift at 50 and 75 nights warns you repeatedly that the choice is final and you have to click to acknowledge this. Now whether the SNAs can be usefully redeemed in good times or bad is another issue that has been discussed endlessly already on this forum but the irrevocable choice of SNAs as your annual gift is not in question.