An athlete service platform implemented at a server system obtains athletic performance information and selectively stores that information in a plurality of athlete-user accounts in which each athlete-user account is associated with a respective athlete competing in one or more athletic events. The server system obtains a set of advertisement parameters from an advertiser which specify how and whether to direct one or more advertisement messages to one or more of the plurality of athlete-user accounts. The set of advertisement parameters includes at least one performance parameter. The server system identifies, with reference to the plurality of athlete-user accounts and the athletic performance information stored in those athlete-user accounts, a target athlete-user account associated with an athlete that has achieved the performance parameter as indicated by the athletic performance information. The server system directs the advertisement message to the target athlete-user account.