I don't get the economics of this. For example if you send more than 20 a month you get free pickup. In this scenario, with the example tshirt I would be paying

I don't get the economics of this. For example if you send more than 20 a month you get free pickup. In this scenario, with the example tshirt I would be paying $2.85 for you to pick it up, pack it with your own materials and cover shipping? Even if you got the shipping for half of that, won't the pickup and packing materials/ labour cost way more than a couple of dollars?