A method performed by software generates a render request record for a render request submitted by a user of an app and stores the render request record in a queue database. The render request includes a visualization to be rendered. The software selects the render request record from the queue database. Selection of the render request record is determined at least in part by a priority value that depends on an amount of time the user has spent using the app. The software generates a rendered image for the selected render request record, using render data. Then the software publishes a publishing element including the rendered image to a newsfeed stream displayed by a social networking site.