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How does the point system works ?

I don't know about other modes but in 2vs2, the goal for the team is to reach 500 points, and when each round ends the winner team gets some points , sometimes they gain 305 points , sometimes they gain 10 points.

And here is my question , is it just RNG or is there something that effect the points?
like how many cards i played or how many cards does the enemy team have in their hand ?

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