What I am trying to say is the higher the rank the greater the responsibility. Say for example the bounty manager is legendary he won't risk his account as a legendary knowing that the campaign is a scam and he himself is a scammer. So if the bounty is being managed by a legendary you can't argue that it is not legit.
I dont want to spoil your beliefs but not only having a legendary account into this forum would already signifies legitimacy of a certain project. How about putting up consideration on checking those accounts if being sold or not? There are already instances into this forum where there are legendary accounts do handle out bounties but in the end it turn out to be scam. Always have the awareness and be sensible anytime if you do see suspicious acts.
And in addition, even a so-called trusted campaign manager was hooked by a scam project and a scam bounty campaigns and his affected his rep and even pulled him down, just search about the issue of atriz.
That's why it's so important that you make a thorough research to the project you're wanting to join on their bounty campaigns or just choose a bounty manager that will not make your efforts into waste in promoting those guys.