Hey there,
Wondering which criterias do you follow to pick a bounty where to participate?
Definitely should check the team, roadmap, whitepaper, but is there something specific that you consider before participating?
Manager. If you join under reputable bounty/campaign managers, the project will likely ended succesfull although it's not always 100% true.
Funds during ICO. Some people joined on ICOs which have raised huge amount to make sure they will get paid when ICO done.