[usastandsunited]

No, Hodar is not correct. You are confusing the Internet with "web sites". Maybe the most hit web sites are porn sites, i don't know. The Internet is the sum of networked computers. Don't confuse the "Internet" with some web sites hosted at some ISPs that will probably be out of business in a year or two.
Communication has made the Internet what it is today. If you have to pin one thing down to say something has made the Internet what it is today, that would be none other than the still dominant Internet Killer application called "Email".

[Hodar]

Don't confuse the "Internet" with some web sites hosted at some ISPs that will probably be out of business in a year or two. Communication has made the Internet what it is today.

And how much do you pay for email? The internet consists of hundreds of millionss (if not billions) of dollars of hardware (routers, switchers, servers, fiber, uplinks, ect) each with a real tangible cost. ISP providers do not make enough money on an individual person to pay for their overhead, thus the industry of webhosting was created. Webhosting is a lucritive business, as the web site purchases bandwidth and data space at a premium; thus the webhost charges the website money based upon the bandwidth the website consumes. The dominate force in webhosting is porn, still. Porn brings in 'real' cash, as individuals who subscribe are paying their ISP (~$20/month) and the porn site of their choice an additional $40-200. Email, although convenient does not require the bandwidth, streaming video and audio requirements that real-time porn does. Furthermore, one does not need DSL and cablemodems to read email, but to watch streaming video and to download large files, this is required. So, basically those who subscribe for the porn services, are buying the equipment we all get to use.