at the manufacturing level they may just have a person checking/watching a machine cutting these shapes out at thousands per hour. that guy is probably paid < $5 an hour. even manual laborers dont get paid that much there.
at the shipping level, the company is probably taking advantage of cheaper shipping by combining it with bigger products that it makes, or if someone else has some space to sell in their own shipping containers. these products would go around the world and so by scale they can sell as much as they produce.
individual products only net very little profit for the company, but due to them selling hundreds of thousands constantly they can actually turn a decent profit. or its a side thing to help optimize their shipping costs for other more profitable products: imagine a truck filled with computer desks the company could be manufacturing, with all that empty space under/between desks - this can fill that space.
