Because Feeding America doesn't receive monetary donations in that kind of volume to hand out money. They also don't have a "food box". You clearly are speaking from a ivory tower position and it's quite disturbing.
It's a food bank network that uses the monetary donations it receives to support the logistics of moving hundreds of millions of pounds of food to food banks. The value of that food exceeds their monetary donations.
It's a food bank network that uses the monetary donations it receives to support the logistics of moving hundreds of millions of pounds of food to food banks. The value of that food exceeds their monetary donations.