There are several business web hosting plans that are offered by different web hosting companies. They are reliable. Hence, choose the most suitable on for you.
Overselling is a business model where the business sells more of a supply than they actually have to a group of customers since they know that a large percentage of these customers will never use 100% of the supply. Cell phone companies oversell their talk time - offering huge packages of possible talk time minutes to customers for a very low cost since the know that it is not humanly possible to utilize all those talk time minutes in a month.