Abstract: Disclosed in some examples are systems, methods, devices, and machine-readable mediums for providing information about the actual viewing audience of an online advertisement. When an online advertisement is displayed to a viewer, the online advertisement image may contain a tracking pixel pointing to a system which, when retrieved, causes a data object to be installed on the viewer's computer. Later, the viewer may return to the system as part of participation in an otherwise unrelated online survey. The system may recognize the data object, and insert questions related to the online advertisement in the survey.