A search engine where the registration will be free for every domain! The difference will be that the given priority will not be up to the amount of money given for the subscription (it will be free for every user) but the average time that someone spends visiting a site. For example if someone's domain has average visiting time for all the users 5 minutes, will have higher priority against someone elses domain that has 2 minutes average. In that way the more interesting sites will be...