The machines they are using to make them are old school Die Cutters that are manually loaded.
A Machine operator is picking up a blank piece of cardboard and feeding it into the machine which then stamps it into a specific form while branding/ adding graphics to the blank. It really is simple. The machine operators load the machines and they have a laborer remove the stamped product from the machine and stack it on a pallet.
They will pay up to 21 to someone who has used a die cutter machine before (anyone with any type of machine operating will fall in the middle somewhere)