A method to untarget users of an online service for advertising includes embedding first code corresponding to a first pixel and second code corresponding to a second pixel in a version of a webpage and providing the version of the webpage for loading by a client device. Loading of the version of the webpage by the client device triggers execution of the first code and the second code by the client device. Furthermore, execution of the first code by the client device signals an advertising platform to forgo providing one or more advertisements for a service associated with the server system to the client device. Additionally, execution of the second code by the client device provides a signal to the server system.