It'd be extremely nice if they did, but so far I haven't had any luck - especially since there are a -lot- of chicks disposed of and I'd be selling them. What you're essentially asking the company to do is to give you their leftover product so you can take a cut of their profits from their potential customers.
I have plenty of room to take in a hundred chicks a week for a month or two, but I won't eat 100 chickens a week and if I sell or give those away to other people then the hatchery has lost business.
I'd still like to find a way. Even paying pennies per extra chick would be nice. But killing the leftovers instead of putting them to use means that the hatchery still saves money.
Good luck. If you do manage to get a hatchery to agree (and you should definitely try) let me know.