In order to provide better data-driven subscriptions implementation, the subscribers of a Scheduled Task or Data Alert should be modified dynamically. Currently they are a static list of emails, which is not convenient when a report must be sent to a whole group of users in an organization, because the group members can constantly fluctuate.
Report Server should provide the option to declare an external data retrieval service in the ST/DA subscribers list. This service could be a REST API endpoint or a file path that will return the list with the subscriber emails.