Today they are almost all scam projects or projects that are made only to create initial hype and then die! There are no more bountys than there used to be where you earned even 10 thousand dollars per signature! Sorry you arrived too late!
At least if he can get the right one and then it's possible to earn at least thousands of USD by participated in the signature campaign but this depends on what rank that already achieved by him. Remember that the result of our reward will always be pegged with the price of token and did you see hex? it was going crazy.
When the coin can make 10x or 20x after the bounty campaign and the participants got big return for sure.