crazy bird
zerozero and Guppy sum it up a treat, especially on 'short haul'.
There is a lot of money, and I mean a lot to be made by offering collection as late as close of the working day, with delivery assured by 0900 or 1200 the next day in another Country. If you take the EU for example, this can only be done by flying at night.
Phone any of the 'Big' Express Freight companies in Europe and get a quote to send a document, say a 12 page contract, from say, London to anywhere in Europe about 1000 miles away. Ask for a collection at 1600 Local Time and delivery by 1200 Local Time, assured. The price will, I am sure, blow you away.
If overnight is not possible, get the fastest delivery available quote, it will still blow your mind. It will go as far as possible 'overnight' by air.
Now.......... When zero sends you those chocolates, it can't be done overnight, or can it?
It's all about 'very' high yield, 'very' urgent documents, the rest is additional income. It's all about local time collection and delivery.
Bored