You can select the payment period in your account. Two options are available now:
Weekly - net 7, hold 4 (For the first payment after registration your earnings will be on hold for 14 days).
Monthly - net 30, hold 30.
In order to choose the billing type, please follow the link: https://publishers.propellerads.com/#/pub/profile/payment
Minimum withdrawal amount starts from $5, depending on the payment method.
If your balance is less than your min payout amount then the sum will be added to the next payment until account balance will reach specified minimum.
All payments are being processed automatically.