A system and method are provided for hosting digital images embedded in an external website, wherein the digital images are modified to include additional content such as advertisements when served to a guest of the external website. In general, a host website including a web server and an image database operates to host digital images for external websites. When the web server associated with the host website receives a request for a digital image embedded within a webpage of the external website, the web server analyzes metadata associated with the digital image to produce selection criteria and selects additional content to add to the digital image based on the selection criteria. The web server then modifies the digital image to include the additional content, thereby generating a modified image, and provides the modified image to the requesting node.