As bounty hunters its your job to find a good campaign don't just rely on others suggestions you should always have your own way to determine if the project you want to be part is legitimate.
As for my suggestions I create a thread that only list a bounty coins or tokens that only listed in exchange.
Here is the link
https://bitcointalk.org/index.php?topic=5232710.msg54025514#msg54025514Just because a project is listed on exchange don't give them a check as a legit campaign, take a look at digitalbits, they are listed on exchange and doing absolutely great still refuse to be pay hunters reward,
To me that is not an authentic criteria to determine which campaign will be rewarding, there are so many disappointment from project owners that left hunters wondering and confused.
Indeed, whoever thinks that CENTRA being one of the successful ICO during its campaign and even promoted by Mayweather will be turned out to be a scam/fraud. We can never tell if the project is legit during its incubation period unless they had successfully delivered their roadmap.