Yeah, I hold on to pet quality roosters until I can find them a good home. Not too hard to do since they're small and not prone to causing trouble. Some folks take theirs to poultry auction as "misc bantams" if that is an option for them and unload them all at once. I've also heard of people who keep all their serama culls in one big flock away from their breeders and just let them live as chickens.... s'what I'm gonna do once I have the land for it. It is a resource sink, but the way I see it, I am responsible for every animal I bring in to this world to the very end.
People won't contact you to eat them even if you're rehoming for free, I've found. They don't turn out a carcass worth ending a life over. Folks looking for something that dresses out so small do better to look for quail. There's other stuff to worry about when looking for a good home, though. I have gone to someone's property to deliver a roo where I could hear LOTS of roosters, so I got the heck out of there without even going to the front door. They saw me pull up and were not happy, left threats on my phone for two weeks afterwards. That rooster is a house pet for someone else now instead, thank goodness! I've also been contacted by people who think it would be funny to hand off a tiny chicken to another pet as a toy to kill or a novelty meal. They've always gotten nothing but an earful from me. Don't be afraid to ask potential homes questions, and don't be afraid to turn down a potential buyer because you're uncomfortable. They're teeny birds hardly eating any food or taking up any space, they can sit with you a bit longer... better than them going to a hell house.