It sounds like you're referring to the "Automatic Payment Schedules." When you set up a payment method, your available balance will be disbursed to your preferred payment method automatically according to your chosen payment schedule. Your balance is only withdrawn automatically when it exceeds a specific limit (e.g., $100 or more) on your scheduled withdrawal date.
I want to note that you can withdraw your earnings anytime by going to your Settings › Get Paid page.
I hope this helps! Don't hesitate to post any other questions you may have regarding withdrawing your earnings!