Internet-shop "printing" is:
the minimum time of the order
access 24 hours, 7 days a week
online payment on the website
delivery to the office (or home)
templates (saving time and cost for the designer)
personal account order history (for reporting)
ease of use (in 3 steps)
no bureaucracy!
online price calculation (calculator)
print any number of copies (from 1 piece)