CashKarma pays you by PayPal. You can enter your PayPal address when you first withdraw your money. The payout limit is 13,500 karma points, which is $10. Every time you request your money you get 675 karma points for free.
If you collect more money, the points / money exchange rate will be better. $25 is 28,500 points (instead of 33,750), $50 is just 50,000 points.
The money can be requested in the Rewards menu and you will get it within 72 hours.
You can download the application here. If you join via this link or enter the "hungary" code as a referral afterwards, you will immediately get 500 points for free.
AttaPoll is an another mobile survey app I can recommend.