"Businesses come and go on the Internet. And many of the ones that are staying aren't even making any money. For example, Amazon.com spends $1.12 for each dollar of revenue it generates.

However, when most people think of business on the Internet, they seldom think beyond those businesses with a retail customer interface. But there are businesses who are making a lot of money off the Internet, but not necessarily because they offer retail products and services. Who are those businesses?"