>>1
Reasonable, but probably not significant. If the food is cheap and available, and is not rat poison, it will be purchased and consumed for those reasons; in fact, it's short lifespan is designed around this idea - it lasts for a short time and has minor piece-wise overhead, but it gets eaten quickly, relatively.
The low-overhead means of downplaying this food - regulating providers to give out nutrition (anti-nutrition?) charts with their food - demonstrates that by and large people don't care as much unless they already have cared enough. Its convenience to taste is the only consideration.