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Collecting application execution data by a push service and targeting application programs with advertisements based on the collected data. Statistics such as activity, popularity, and frequency of execution for each of the application programs are generated based on the collected data. The statistics are matched to advertising campaigns to select application programs relevant to the advertising campaigns. Advertisers are charged for delivering the advertisements based on the selected application programs. For example, advertisements delivered to frequently executed application programs are more expensive than advertisements delivered to application programs that are rarely executed.