The time of shopping online have steadily increased over the years. To the point that it seems like the delivery companies that I knew of growing up such as USPS, UPS, FEDEX, and DHL (I will call them the BIG 4) possibly can't handle the volume. So now this issue has opened up an opportunity to create a new type of delivery service that I call sub-couriers. They are the ones that receive packages for delivery that either the BIG 4 don't have time to deliver so they are passed off to them to complete the route or companies prefer them due to cheaper shipping rates.
