In fact, it is now very difficult to make good money on bounty, because there are very few worthy projects and there are more participants in them!
Bounties nowadays are now more into free advertising.
If the project fails, they will return the money of their investors and has a rule that if their project succeeds, distribution will happen. That's one unfortunate rule for bounties so speaking about the rewards there, it's not really worth anymore unlike few years ago.