What's wrong with bounty hunting? Some people consider what they are doing as a job, so they are like "JOB HUNTING"...
I believe that it is not Bounty Hunters is he mentioning but the Hunting itself , Because according to His complete post he is supporting the Hunters though expected that they have no capacity to bring down the scammers project owners.
The intention is that those Hunting job turns scams most of the time for the reason they are being scammed by the project.
There's nothing wrong really as long as they follow the rules and as long as they promote a legit project that would not scam investors.
Better read the full context of the Post , it was supposed to be addressed to the Developers/teams and not specifically for the Bounty Hunters.