Good bounty campaign depend on good ICO. And if project so potential, they will find good manager for promote community for it. So you should focus in ICO, and good bounty manager.
I hope that in the future you'll not be supprised because of being scammed by a bounty campaign of a good ICO project 
. Scam bounty campaign is not only belong to scam ICO project, you should know that you also can be scammed by a bounty campaign of great project as well . If you ask old member in here I think you'll know about it 
. I only know about Envion bounty campaign only.