I participate in bounty only from trusted managers who value their reputation and do not manage fraudulent bounty campaigns
same here I don't participate in anyhow bounties I only participate in bounties program promoted by a reputable manager so as not to waste time
And you are doing the right thing there are many campaign managers appearing but the truth is that the job of a campaign manager is extremely difficult even if I do not have direct experience in it, it is not difficult to imagine how difficult it is to deal with thousands of users when everyone is trying to get your attention so you verify that they did their job correctly, so only participating in bounties of trusted managers is a good idea.