When I first saw the turkey bucket I asked the same thing. I was looking for an over sized bucket for brush clearing, and ran across the "turkey bucket" , it's HUGE.
It's designed to scoop up large quantities of light stuff IE turkey feathers out of the coop. It works great for me it almost the size of a dumpster.
You can't think of lifting large quantities of dirt, no tractor would lift it.
Looks like a good thing... if that's what you need.... and you seem happy with it... would be too big for me... but then I don't have any really light stuff to move.