I know this will be unpopular with folks like tptacek, but I've always felt strongly that bug bounty programs offer too many perverse incentives to all parties.
More often than not it becomes a tool for companies to sweep issues like this under the rug and then use HackerOne's system to force the reporters to play ball (because they want to keep getting paid). I hate this sytem.
I'm 100% behind open, public disclosure and if it were my own product in question, I would offer bounties for _public disclosures_. That keeps everyone honest.