I would say all of the above except releasing to hunt, I have coturnix and they aren't good hunting birds. A lot of people in my area get the eggs to make pickled eggs with, a pint of pickled eggs sells for $5 here.
Personally I don't eat the birds, and I can't eat eggs, but I do raise them for others to eat/raise to eat.
Personally I don't eat the birds, and I can't eat eggs, but I do raise them for others to eat/raise to eat.