title: Clarify the Firebase connections
body: <p>I am a little confused about the Firebase pricing model, special concern is the connections or more precisely concurrent connections. </p>
  
  <p>Let's have an example of a mobile app for iOS called FanZONE:</p>
  
  <p><em>User will create groups during football matches. They will comment on the actual game and the comments are immediately displayed on each members screen.</em> </p>
  
  <p>Does this scenario means that each user who is participating on commenting/viewing counts for one connection?<br>
  So if a group contains 100 users who actively follow the screen and from time to time comment is there 100 connections each 90 minutes long?<br>
  What about users who have the app in the background and the app checks each 5 minutes the score. Is this connection as well 90 minutes long or only a fraction of time every 5 minutes?</p>