Scenario $14-1$When the social networking$/$gaming website Foursquare launched in $2009,$ it was only accessible to residents in $100$ U$.$S$.$ cities. One year later, an updated version of the service allows check$-$ins from locations all over the world and has over $500,000$ users internationally. The site, which allows registered users to connect with friends and update their location, receives over one million check$-$ins per week. When users visit a particular store, their profile is automatically updated and they can share feelings about favorable experiences $($or unfavorable ones$).$ The site now holds partnerships with over $800$ establishments worldwide, and high$-$profile partnerships with the Bravo Network and The New York Times have greatly increased the site's popularity.$($Scenario $14-1)$ One of Foursquare's strengths is that it offers a very interactive experience to its users. Tracking brand interactivity over the Internet can be done in ways that are not possible for methods of traditional advertising. One way this can be done is the Internet