3rd Dimension: Secondary Use.
Websites may state in their privacy policy what they intend to do with your personal information and your interaction with the website. For example, the online travel agent may analyze your web-usage data to optimize the website design or to learn about your preferences for products or services. This type of analyzes are called ‘Secondary Use’ as they do not facilitate the primary purpose of the online travel agent, which is providing travel information and facilitating purchases. For our scenarios, the online travel agent will state either that your information will not be used for any purpose other than providing travel information and facilitating purchases (i.e., no secondary use) or that your information may be analyzed for other purposes, such as revealing your web-usage.