At least some embodiments of the present disclosure are directed to an exemplary system including an application server; a cache memory storage; and a datastore; where the application server is at least configured to: receive, from one or more web client sessions, real-time user-related activity data that is representative of one or more activities performed by a user during a day; store the real-time user-related activity data in a temporary cache user profile data structure of the at least one cache memory storage; upon the receipt of the real-time user-related activity data, invoke, in real-time, a plurality of APIs that are configured to determine a user-specific eligibility data, generate a fixed activity plan; and attribute, in real-time, an activity performance to the fixed activity plan based on a pre-determined allocating rule.