Running cost may be high and as a result, using cloud service become expensive?
When you consider cost, not only the cost what you see, but other invisible cost should be considered such as man power and operation cost of the system.
For example, to send the invoice, not only the cost of paper and postage, but you can not ignore the man power who attends to print and arrange the posting. Similar to this, sending fax require system maintenance but not only communication fee.
As mentioned above, when you think about entire cost, you will find that cloud service cost has merits.
