It's true that some bounty campaigns are scam but I still trust most of them. You can still earn by doing bounties but it is also important to be cautious especially these fays. So better know as much details about a certain project before participating.
Me too, though I'm not so close to bounty, I believe.. that with bounty, it can earn a passive income that can be used as the other side of the priority activities.
Talking of knowing a quality bounty, in my opinion personally.. we also have to see its bounty manager too, it can also characterize that bounty is quality or not.