It wouldn't be able to last. Everyone wants fast food to be affordable. That's why subway does the $5 foot long, Taco Bell does the $5 box, and tons of burger joints have dollar menus and $5 meal deals. With duck, absolutely none of this would be possible. You could get a $10 duck breast that won't fill you up. Plus the way chemicals are pumped into fast food for preservation and flavor after freezing, I'm sure it would completely mess up the most important quality of duck, the moisture.