Binning is a lot of it, but what happens when they have more of the good bin than they want, for the market proportions they're targetting? They'd be fools not

Binning is a lot of it, but what happens when they have more of the good bin than they want, for the market proportions they're targetting? They'd be fools not to either just sell the good as the bad, when nobody can tell (like when acheivable frequency is the difference), or more likely just make it bad then sell it.