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
Not sometimes but often unpredictable, this is like how we predict the value of cryptocurrency. I tend to be more consistent for every bounty that I follow, so the thought of replacing the bounty doesn't occur to me, because every time I follow a bounty I research more closely and sort it out, but because it can't be predicted how future growth will often fail. 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