If the game is a market. Everytime people lost, their cost will transfer to the winner and losers will get small coins amount, which is fresh coins for the market. Adventure only make coins lost from the market everytime people can not finish the game. People won't get any coins from offline playing. Timed rewards are pure new coins for the market. After that, I have difficulty sometimes when I drag cards to piles, the game sometimes won't respond or there may be lag. Overall, good design.