Drupal 7. Custom pages for displaying data
Using hook_menu() should get you the the ability to create those three pages.  Then you can use the page_callback to display the data you are looking to show. For the subscribers/id, you can use %id and then have pass the argument to the page_callback.  Using the db_query(), db_update(), db_select() functions in drupal, you'll be able to add the custom processing of the database. 

If you are creating your own module you can use theme functions to decide how the page and that data will display.