I buy a lot of whole chickens for my family. I cut them up grill them etc. Whole chicken is much more economical than buying pre-cut pieces.
I learned a lot of cooking tips from my Grandma. My Grandma never wasted a single thing ever. So even the backbone from spatchcocking would go into the freezer until she had a bag filled and she would make stock. It is a great tip for saving money.
Here are my steps and 2 videos on how to cut up a whole chicken first for spatchcock then into 8 pieces :