The most painful experience when promoting a bounty project is thinking you made a right choice by removing the signature of the project you are promoting presently for another project that you think its better and later on? 
The first project you are promoting get listed and doubled in value ,how will you feel? Damn! The fact is bounties are unpredictable sometimes ,no one can predict the end results
As usual, regret about the times you give them effort and then realize it not worth but when it pays, it is not what you expect. Doing bounty campaign is depend how lucky or how good you are in finding a project and you have to stick into it though it is unpredictable and not sure if going to be listed. The first project you are promoting get listed and doubled in value ,how will you feel? Damn! The fact is bounties are unpredictable sometimes ,no one can predict the end results