What is the threshold to get paid out?

When total revenue from all your games combined reaches the payment threshold of $500, your account will enter a 30-day verification period at the end of the month. If a monthly pay period ends and your account has less than the payment threshold, your balance will roll over to the next month. 

For more information, please read the uploader agreement found here: http://www.kongregate.com/pages/uploader-agreement