I was asked if it was possible to display a list of the number of active members (subscribers) on each plan and display it on the front end of the site so I have written a simple module to do it.
It's not very elegant but I have attached a copy if anyone wants to use it.
UPDATE 25/11/2016 - I have modified the module so that you can now select plans from a single category to list or from all categories.
Best regards
Trevor
