Investors should read the whitepaper of a certain project to get the feel if the project has the potential to make it big or being a fraudulent one.
Also, aside from investors, a bounty hunter should at least browse the whitepaper before joining the program.
In that way, he will know if the project is really authentic and has the capability to deliver their objectives.
With that, he will know for sure that he will be paid afterwards and get the money that was promised to them.