Assuming your approach to gathering data is similar to the other guesses in this thread, your stats will be skewed for "pushers" who actually target their notif

Assuming your approach to gathering data is similar to the other guesses in this thread, your stats will be skewed for "pushers" who actually target their notifications, as opposed to sending a homogenous marketing blast. People who target their notifications (to a geoloc, or topic of interest for example) are going to be incorrectly represented here.