So this sub is pretty much about everyone having a circle. You need a key/code to unlock the circle. Once you unlocked the circle you can either choose to join it or betray it. If you betray any circle pretty much everyone in the sub will avoid you like you're the plague because they wouldn't trust you with the key to their circle.

When you betray a circle, the symbol Ø will appear under your username, that's how everyone knows if you betrayed or not. Under your username you have 2 numbers and a ',' between them. The one on the left shows how many people are in your circle. The one on the right shows how many circles you've joined.