From their site:
PAYMENT INFORMATION
At The Jack Network, we only process payments via PayPal. PayPal is recognized as the leader in online payments, and based on survey responses from of our Shoppers, PayPal remains the preferred method of receiving shop-related payments.
The email address reflected in your profile with us must match the email address associated with your PayPal account. For this reason, please take a moment now to review your profile and ensure that the email listed is where you intend for us to send your funds. When a PayPal payment has been processed, you will receive an email to let you know that payment has been initiated. In most cases, this will occur 6-8 weeks after you have completed an assignment.