When one crosses the line from hobbyist to breeder, be it shrimp, fish, cats or dogs, whatever, one should strive to breed the strongest example of that specie. Part of that comment to excellence is culling. ...
Never a truer statement made! If you chose to breed, breed for the absolute best example you can of the goal you wish to achieve. This will involve ruthless culling at times.
It helps if you know shrimp A) Do not have a brain, just a cluster of nerves, and B) Do not feel pain.
1: Use as a garnish. Yes, our shrimp are edible.
2: Feed to other fish/turtles/herp/etc. Shrimp are lowest on the food chain and are very nutritious and can actually get other aquatics into breeding shape.
3: RAOK shrimp culls. You make new friends and help out someone who wants to try shrimping.
4: Use a cull tank. Problem then, is at some point you may have to get rid of excess there, too.
5: Use as fertilizer for plants. Aquarium water can also be used.
You get the idea.