| The web-advertising model is an extension of the 
    traditional media broadcast model. The broadcaster, in this case, a web site, provides content 
    (usually, but not necessarily, for free) and services (like e-mail, chat, forums) mixed with 
    advertising messages in the form of banner ads. The banner ads may be the major or 
    sole source of revenue for the broadcaster. 
	   
    
    The broadcaster may be a content creator or a distributor of content created 
    elsewhere. The advertising model only works when the volume of viewer traffic is large or highly specialized. 
 Portal -- is a point of entry to the web, usually a search engine that includes diversified content or services. 
	The high volume makes advertising profitable and permits further diversification of site services.
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    | Personalized Portal -- allows customization of the interface and content. This increases loyalty as a result of the 
	user's own time invested in personalizing the site. | 
  
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    | Niche Portal -- cultivates a well-defined user demographic. For example, a site that attracts home buyers, young women, 
	or new parents, can be highly sought after as a venue for certain advertisers who are willing to pay a premium to reach that 
	particular audience.
	[Costumezone.com] | 
  
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    | Classifieds -- list items for sale or wanted for purchase. Listing fees are common, but there also may be a membership fee. | 
 
  
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    | Registered Users -- content-based sites that are free to access but require users to register (other information may or 
	may not be collected). Registration allows inter-session tracking of users' site usage patterns and thereby generates data of 
	greater potential value in targeted advertising campaigns. | 
 
  
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    | Query-based Paid Placement -- sell favorable link positioning (i.e., sponsored links) or advertising keyed to particular 
	search terms in a user query, such as Overture's trademark "pay-for-performance" model. | 
 
  
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    | Contextual Advertising -- freeware developers who bundle ads with their product. For example, a browser extension that 
	automates authentication and form fill-ins, also delivers advertising links or pop-ups as the user surfs the web. Contextual 
	advertisers can sell targeted advertising based on an indivdual user's surfing behavior. | 
 
  
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