Apple has a program that allows developers to submit bug and vulnerability reports and receive rewards for doing so. Some developers were unhappy with the way this system works, because payouts can only be received for serious mistakes, and the amount is always different.
Recently, a student was able to get a record amount for discovering a bug that allows access to the camera in Safari. He was also able to detect a vulnerability that, through iCloud, allowed access to Gmail, iCloud and Paypal accounts. Ryan Pickren received a $105,000 reward for his work.
This program involves a possible payment of up to one million dollars from Apple, but the developers who receive it do not always disclose the amount.
A source: iPhonehacks