My concern would be that tournaments will not always suit everyone depending on the time they are on, and also just how long the tournaments take to play.
Then there's the bias that tournaments currently have toward those with stronger decks.
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Fair points. The tournaments would be scheduled several times a day for the current player base size so everyone should find a suitable time to play. Plus, you can save your tickets and just play on weekends when you can concentrate more.
There is no bias for the stronger decks. You win one game and you get the rewards you would have anyway. If you are better you earn more.
These rewards are incentive to play and improve your skills, if you don't want to improve you'd have to ask yourself, what are you doing here.
Each account can only get one ticket per day, so just play the rewards tournament when the 'top' players are in bed :-P
PS: And 1 game in single elimination takes 3 minutes. So win your game, collect your reward and leave the tournament. If you want more, play longer.