As far as i know, the winner of every JDC duel gets five points and it always was like that. But i think it's not really a smart idea...for example, if you make ten "mini duels" to 2 roasts and you win them all you get 70 points (20 roasts+50 winner points). If you made a 20-roast-battle and win it, you'd only get 25 points (20+5).

See my point?

I would like to suggest that the "winner bonus" has to depend on the amount of roasts. Like when you play a 50-roast-game the winner bonus is 25 and in an 10-roast-game its 10. would be more fair and could prevent cheating.