Longtail marketing strategy

Most of the marketing strategy are based upon the Pareto model: 20% of the consumers make 80% of the turnover. So firms concentrate all their marketing policy on these consumers disconsidering the others.
So "Longtail marketing stratetegy" is based on the idea that "the sum of many small markets is worth than a few large markets and that fringe, underground or independent stuff can collectively make up a market that rivals bigger ones". So this is completly a new point of view.
Internet reducing transactions and sales costs has made this possible. And firms such as "Ebay" or "Amazon" have developed their business on this idea. They have done a market for niches. Another example of this is video on demand since you have a large range of products in which a large number of people can pick up according to their interests.