If you live in US, UK and Germany then your potential earnings are much higher and if you use iPhone you will also earn more compared to Android users.
http://www.youtube.com/watch?v=kJAxLsMvPS4
You can earn in this app by:
1) Downloading new apps. You will also earn extra Karma points through Karma play in which if you open the app again later on for 4mins you will get the bonus points
2)Do surveys. The good thing about survey in this app is that you will still get bonus points if you are not qualified for Peanut Labs surveys
3)Watch videos. You can watch videos many times and earn Karma points.
4)Invite your friends. You will earn 30% of all the offers completed by your referrals.
There is also achievement in the app where if you accomplish them, you will get either Karma points or an increase in the earnings by up to 12.5% if you reach level 4. Do more offers and you will get more Karma points and reach that level faster.
Withdraw :
You can withdraw through paypal for cash and other gift cards available. Minimum withdrawal for paypal is 6000 Karma points which is equal to $5 but i suggest you to collect until 10000 Karma points as you will get $10 saving $1