The implementation of affiliate marketing on the internet relies heavily on various techniques built into the design of many web-pages and websites, and the use of calls to external domains to track user actions (click tracking, Ad Sense) and to serve up content (advertising) to the user. Most of this activity adds time and is generally a nuisance to the casual web-surfer and is seen as visual clutter. Various countermeasures have evolved over time to prevent or eliminate the appearance of advertising when a web-page is rendered. Third party programs (Ad-Aware, Adblock Plus, Spybot, pop-up blockers, etc.) and particularly, the use of a comprehensive HOSTS file can effectively eliminate the visual clutter and the extra time and bandwidth needed to render many web pages. The use of specific entries in the HOSTS file to block these well-known and persistent marketing and click-tracking domains can also aid in reducing a system's exposure to malware by preventing the content of infected advertising or tracking servers to reach a user's web-browser.
A handful of networks, such as the U.S.-based Public Broadcasting Service (PBS) public television and National Public Radio (NPR), have been founded on a principle which effectively reverses the commercial broadcasting owned-and-operated station model and is called a state network. Instead of television networks owning stations, the stations collectively own the network and brand themselves as "PBS member stations" or "member networks" instead of as affiliates or O&Os.
31, 1969, organizations requesting rulings or determinations that they are affiliates of a governmental unit must discuss in the request the presence or absence of each of the factors listed (in situations in which no ruling or determination has been received and facts and circumstances relevant to the determination (regarding the otherwise necessary administration of the law).