first of all i seriously doubt these guys eat every last piece of what they make. they take a few bites each and film it and probably throw the rest in the bin.
sure it is unhealthy but if they are smart, they could probably have this 1 unhealthy meal every week and do zero exercise and stay the size they are by eating healthy every other day, none of them have low bodyfat or look in shape, not even "muscle glasses".
it's all an act for what is basically a "tv show".
fair play, they have found a fun way to make a living by acting like idiots for 1 day of the week and filming it.