Review sites are generally supported by advertising. Some business
review sites may also allow businesses to pay for enhanced listings,
which do not affect the reviews and ratings. Product review sites may be
supported by providing affiliate links to the websites that sell the reviewed items.
With the growing popularity of affiliate programs on the Internet,
a new sort of review site has emerged - the affiliate product review
site. This type of site is usually professionally designed and written
to maximize conversions, and is used by e-commerce marketers. It's often
based on a blog platform like Wordpress, has a privacy and contact page to help with SEO, and has commenting and interactivity turned off. It will also have an e-mail gathering device in the form of an opt-in, or drop-down list to help the aspiring e-commerce business person build an e-mail list to market to. These sites generally review e-books.
Because of the specialized marketing thrust of this type of website, the reviews are not objective.