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.
Can you describe what low quality of work in bounty hunting means? i am very sure that participants that delivers low quality of works don't get paid, its always part of every bounty rules, every works you submitted are carefully checked by bounty managers before they reward you your stakes