this is my trick to get a good bounty
1. history bounty manager
2. the amount of allocation for bounty (this is my opinion which is most important because I do not want to waste my time on bounty for low pay) if you can project your income from the bounty before joining.
if profitable join and if not leave
3. website that includes (encryption and whitepaper)
4. project development team

hope this helps and succeed!