The most important thing to do is to look for bounty campaign being run by highly respected managers, because they won't want to do anything to spoil their image, and also the quality of the project, if it is one project you can't invest into don't bother touch it, because that means it doesn't worth spending time marketing what you yourself will not invest into so how are you going to convince others to invest into it, because the amount most bounty campaigns give out is tied to the success of token sale