Methods and systems for determining an individual gaze value are disclosed herein. An exemplary method involves: (a) receiving gaze data for a first wearable computing device, wherein the gaze data is indicative of a wearer-view associated with the first wearable computing device, and wherein the first wearable computing device is associated with a first user-account； (b) analyzing the gaze data from the first wearable computing device to detect one or more occurrences of one or more advertisement spaces in the gaze data； (c) based at least in part on the one or more detected advertisement-space occurrences, determining an individual gaze value for the first user-account； and (d) sending a gaze-value indication, wherein the gaze-value indication indicates the individual gaze value for the first user-account.
