Here at SmartEngage, we believe that a subscriber is a person.  That person may have multiple methods in which you use to contact him/her, but it is still just a single subscriber.

This means that if you have an email address for a subscriber as well as their Facebook Messenger and Push Notification contact details - we will still only count this as 1 Single Subscriber. 

We also do not double count subscribers across different Brand Avatar accounts.  This means that if you have Dave as a subscriber on your Brand Avatar page for Yoga Fitness and Dave also appears as a subscriber on your Brand Avatar page for Anti-Aging skin cream - He is still only considered 1 subscriber for your account.

3 Platforms = 1 Person = 1 Subscriber