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I exclude the signature paid because the escrow system, the campaign good, because they paid with a fixed rate, went other bounty paid with alt token/coins who dont have a rate.
However, the conclusion of choosing the project "why the reason this bounty was good" was no guarantee at all. The @OP explained why the project its good just because of the bounty hunter it's reputable, not every bounty with reputable bounty manager its success it's just for helping due diligence process.
Kinda sucks that they're based on stakes rather than fix rate or at least pay in ETH but I guess for the sake of promotion of the coin, they'll give you the coin that you won't even get to hold for more than a year.
Sometimes choosing bounties are quite subjective depending on how one would see the quality of the project. Is it unique and does it seem to help your needs as well as the society?
This is why some people that don't want to make a comprehensive research would just look at the trust ratings of some BMs so that they can be so sure that they'll manage a legitimate campaigns although that isn't really the 100% indicator as the BMs might decide to hold off the project due to issues.