If you are yet to unlock Gold Membership status you cannot withdraw your balance when it is less than $20 because the cost of transferring smaller and more frequent transactions is not viable for us as a business.
After each survey, the survey reward value will be added to your Surveyz account balance. We do not automatically transfer earnings to your bank account. To complete a withdrawal, you will first need to reach a balance of $20. You can then withdraw your funds to your bank account.