Turns out hackers do not have much of a patience.. who would have thought? 
The previous news about bug bounty was accurate in the lump sum, but premature in the outcome:
DJI to Pay Out Thousands of Dollars After Successful Bug Bounty Reports
Since the news today say the hacker resigned after DJI proposed an outrageous NDA:
Bug bounty hunter reveals DJI SSL, firmware keys have been public for years | ZDNet
Yup, most companies know - it is better to leave managing bug bounty programs in hands of companies which specialize in those. I wonder who will they blame for the failure.

The previous news about bug bounty was accurate in the lump sum, but premature in the outcome:
DJI to Pay Out Thousands of Dollars After Successful Bug Bounty Reports
Since the news today say the hacker resigned after DJI proposed an outrageous NDA:
Bug bounty hunter reveals DJI SSL, firmware keys have been public for years | ZDNet
Yup, most companies know - it is better to leave managing bug bounty programs in hands of companies which specialize in those. I wonder who will they blame for the failure.