Despite their value in the grey market, security researchers are reporting bugs as part of the Apple iOS Bug Bounty program, and some are getting rewards.
Apple Has Started Paying Hackers for iPhone Exploits
Lorenzo Franceschi-Bicchierai, reporting for Motherboard: In 2016, Apple's head of security surprised the attendees of one of the biggest security conference in the world by announcing a bug bounty program for Apple's mobile operating system iOS. At the beginning, Apple struggled to woo researchers and convince them to report high-value bugs. For the researchers, the main issue was that the bugs they discovered were too valuable to report to Apple, despite rewards as high as $200,000