own on the computers for certain number of hours a month for a certain number of months. Their activities on the computer such as software installed and the website browsed are logged and are sent to the companies providing such services. Advertisements are shown on the user¡s screen when the user uses the free Internet services provided. According to the article ¡§Click for Free¡ in American Demographics of February 1999 Volume 21, Netzero provides interactive advertising for their clients, which means that the advertisement will be shown on the screen only when the user of the free internet service is
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