There are definitely more web surfers than there are web sites, so reasonably speaking, most of them, at least the ones built by human beings, should be able to

There are definitely more web surfers than there are web sites, so reasonably speaking, most of them, at least the ones built by human beings, should be able to get at least a modicum of traffic. The reason we have such concentration of popularity today is that we use popularity to direct traffic. That starts feeding into itself fairly rapidly, and the result is inevitably that the same few websites eat virtually all of the traffic.