This looks like it's targeted at small manufacturers for distinct, high-quality but recycling friendly packaging. I see this as just a premiumish product packaging design choice.

It's about $0.20 per staple. The design of the boxes they're demonstrating use 2 - 8 staples per box depending on size and folding design. That's $0.40 - $1.60 which figures into cost of packaging. It's not unheard of for things like bespoke soaps to have extravagant packaging, jewelry, I can think of a few more, I bet you can too. Spending $5 on packaging for a ~$80 product wouldn't be out of line. I'm thinking in that number a box fully glued, stapled, or otherwise, internal packing material, any paper inserts, etc. So on avg. $0.80-per-box, meh sure why not.

I was picturing this being used for the boxes for much larger things, like office furniture.