Penalties for Scooping
You should penalize the people that quit early in matches somehow. The "scooping" culture on Magic Arena is toxic and really leaves a bad taste in players mouths. I've heard from several players that Magic arena has become an unenjoyable experience because you can never finish a game without someone quitting early for no reason. A lot of times what happens is they see the type of deck and immediately quits.

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Ponyfan#82469 commented
Immerhin haben Sie doch dadurch gewonnen.
Vielleicht müssten Sie Ihr Deck wechseln. Decks welche dem Gegner keine Chance lassen zwingen einem ja geradezu zum aufgeben.
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Rezzahan#77802 commented
So you would rather force people through a game they already know they won't enjoy (anymore), wasting a lot of their time, espcecially if you are playing some control deck at a glacial pace? They have the right to concede at any time for any reason. Not allowing that is a way to really lose a lot of players, and thus a lot of money.
It is the roping that is toxic, and quite frankly utterly moronic, when they no longer enjoy the game. As if wasting your own time, and that of your opponent, who is an utter stranger from possibly halfway around the world, would somehow be more of a punishment to them than it is to you. And why even care?