I think the most important thing is to participate in the campaigns of bounty managers who do their job properly.
I don't see a famous manager now, for example sylon, jamal, yahoo. I do not know whether they are retiring or not interested in becoming a manager.
many new managers, so it's difficult to set a good bounty based on manager's criteria.
Many new managers who doesn't have credentials unlike those days when people you mentions are still active doing the bounty campaigns, chances to receive decent rewards and make your work being paid well, now it's a gamble participating with new campaigners, also the reason why I joined the campaign that I'm with right now, manager was also known knowing for running campaigns.