You need to learn about the project, reading and understand their whitepaper and roadmap, investigate and find more info about their team members, and watch their progress.

Choosing of Bounty is not a easy job.  first you should read carefully it's rules, white paper and road map.  Then look management team, real product.    Actually it's not hard to choose good Bounty campaign that you will earn money, because most of them are really profitable

There is no really a foolproof method or strategy to determine what bounty is the best or will be successful. Personally, I use my instincts. If the project ICO is generating a lot of interest among people and they are willing to invest in it, then there is a high chance that the bounty will be successful but you must also check the team behind the ICO and their partnerships and advisors to see that they are not fake people. You stand a better chance if the project already has a working product in the market.

I would say that you should follow a truster bounty admin or team. They are not responsible for a team's cheating or scam, but still they try to keep their good reputation so admins try to stay away from any suspicious people.

It is about experience and knowledge to choose the right bounty. Important is the research and analysis. A good bounty is also base on the campaign manager. I also check the whitepaper and if the project has got a telegram group.

When choosing a bounty campaign try to read the white paper. Know the goals, objective and purpose of the bounty program. You can also do background checks on the project, the people involve of the bounty campaign if they are legit. A lot of bounty campaigns lately have turn out to be a scam. I also check the bounty manager if he has good records with high success rate.

I think must check this point to get a good bounty campaign:
1. don't waste your time on bounty with too low pay.
2. Check Project profile like website encryption (for investor security), whitepaper, Roadmap, etc
3. Project's Team
4. Bounty manager, check the History Profile.

u can check participants who following the bounty. the less is better.
u also check how many fund allocated in bounty

To choose bounty theres so many ways to have you reference like
Research their team background
Whitepaper must be read
The Roadmap if teres potential to grow.

if I have to see the total supply first. because it also determines how many tokens that are in the share.