FEEL FREE TO ADD YOUR OPINIONS BELOW, I MIGHT JUST LEARN A THING OR TWO
these are very good points that you address here. i especially like point 5. you can rely on well known managers and there should be no problems.
and point 6 would be perhaps still the info on bountys which pay out regularly. there the risk is minimized.
Maybe you can advise some good bounty managers that work only with solid projects and distributes stakes and payout in time? I can only tell one agency - Adsist Media. They looks ok, but I don't like some of the projects that they are supporting currently.