You get/earn points to fight each other.
You can get more points if u dueling against other dorm player.
This is the list how much u can get if u won:
Normal Duel = 20 GXA Points
Then here is the bonus u can get if u won:
Same Dorm: +25 GXA
End Dragon: +150 GXA Points
Galaxy-Eye: +50 GXA Points
Malefic: +30 GXA Points
Chimeratech: +15 GXA Points
Cyber Kirin: +5 GXA Points
And now how to earn?
U need to post the result of the duel, if necessary, the image.
Each duel must be Best of 3 to get the points.