That's not a good idea, for it puts the thought into customer's heads it's not worth going to Popeyes. So that's probably not what was the goal of this sandwich
If they had adequate supply, it’s possible they’re a novelty for a weekend and it’s over. They’ve stretched this for months which keeps people talking about them and assuming their stuff is so good that they can’t keep it in stock (when the reality is most likely artificially constrained supply)