In testing of September 6-12, 2013, we examined ads loaded by the Sambreel WebCake ad injector. We checked injected ads 15,834 times from a mix of fourteen different locations in eight countries. We monitored the resulting responses to determine the hosts that receive and pass along the resulting traffic. This page graphs the ad networks, ad exchanges, and other advertising intermediaries between a WebCake injection and the resulting advertisement (shown in ellipses in the graph). This page also reports the advertisers most frequently observed (diamonds in the graph). Color brightness and node size indicate the relative frequency of impressions to/via a given intermediary or advertiser. See also a tabulation of these intermediaries and advertisers.