That's actually very common even with respected bug bounty programs. Communicating exploits to anyone else (let alone the general public) will at the very least make you ineligible for rewards.
IMO if you're participating in a BB program, you should abide by he rules set forth by the program.
If you're not, then you don't have to.
IMO if you're participating in a BB program, you should abide by he rules set forth by the program.
If you're not, then you don't have to.