In this age of global warming, I like the idea of "keeping it green by reading on the screen".
I've been sending out invoices this way for many years, and its surprising how often they are just ignored or "lost".
It seems the onscreen version of an invoice doesn't have carry the weight of a paper one.
Its seems its nonphysical existence leaves it psychologically weak.
Or maybe people are just lazy.. and don't like to pay