The most important point is to check exactly what experience the dev team has in order not to be cheated and get reward at all. Avoid anonymous projects!
That's right, because without checking every project launched, the potential to be deceived is huge, especially if someone can easily be attracted to every offer from the team whose origins are sometimes unclear.
For beginners who cannot do good research of project, it is good to look for campaigns launched by experienced managers. Bounty managers have a closer contact with the dev team, they are able to better assess the owners intentions and their potential.
Very good advice, because now experienced managers have held many good and successful projects with very good sales, so that option is still much better than directly investing in projects that are completely unknown to the newbie.