Bounty hunters this days looking for free money, and most of bounty hunters provide low quality of work, and did not help the project to success, that is why i think bounty not as before and profit not as before.
How do you mean by them providing low quality of work? Majority of the hunters that you see participate more in Facebook and twitter campaign, aside the few ones that just go into signature campaign, and when it comes to working on twitter and Facebook, most hunters are just simply to share what the project developer or management team have on their page so that it can reach the world out there, and this does not have anything to do with appraisal again as it is a simple task.
Except maybe you are talking of those that are into signature campaign that is mandated to write some topics on behalf of the project on a particular period of time. The only thing I just have to say on that is that hunters are no longer respected, so they just have to look beyond just hunting alone, but much more opportunities.