Check who is involved in team and whether they have escrow for their funds or not this two are most important factors you should look up to before joining any bounty campaign and right now I felt that Autonio is the best bounty campaign so I am part of it and I am sure I will get paid for the hard work which I did.
Yes, I think the dev team is the most important factor to be a successful ICO project, also if you do not want to spend too much time to read the details, you can just try to see if it is a hot project on this forum.