The first point is one of my important reasons for joining a campaign. Communicative, friendly, conscientious and fair bounty managers are my favourite, even though not all of the criteria are in one person or team. We must also pay attention to BM's commitment to select participants, especially since there are many cheaters and spammers today.
The second and third points are equally important, so BMs that use escrow will usually be more trusted. Especially now that there are many dramas related to distribution delays and reduced allocations.
Communication, cooperation, and good planning between the BM and the dev team will definitely result in a structured bounty campaign, all of which will certainly get their respective goals fairly. That's just the name of mutualism symbiosis, don't be like a parasite that only uses others without giving feedback.