How many pages are there on the World Wide Web? How many of them are “useful”?
Even the Google folks don’t know.
So how many unique pages does the web really contain? We don’t know; we don’t have time to look at them all! :-) Strictly speaking, the number of pages out there is infinite — for example, web calendars may have a “next day” link, and we could follow that link forever, each time finding a “new” page. We’re not doing that, obviously, since there would be little benefit to you. But this example shows that the size of the web really depends on your definition of what’s a useful page, and there is no exact answer.
And that’s exactly the beauty of the web.
Everyone gets to post their information and everyone gets to decide what of that is useful.
Pretty much the definition of net neutrality.