That depends on the type of tournament you’re taking part in.
If it’s a real money tournament, you will receive the winnings from your games in the normal way. If you win a jackpot, the winnings will therefore be automatically credited to your account.
On the other hand, if you’re taking part in a play money tournament, you will not receive the winnings and jackpots associated with your game. You pay a registration fee, and then play with “play money” game credit. You can only win points, which improve your position on the leaderboard. To win a prize, you must climb to one of the top spots on the leaderboard. You will find a list of winnings for each tournament in the leaderboard details.