think of it this way, feast sold out, which means peopel have already payed money, which means regardles sof weather they come or not, event doesn't loose money on this. that being said, ther ewill either be enough food, or food left over. left over food is always good, as it means peopel can take it home.
learnedax said "ooh, left over pie! um, i mean that woudl be too bad, yeah" so there :)