Hi every one. I just wanna ask if , is there any ways to prevent or minimize the nonpaying bounty campaigns?

I joined a lots of bounty campaigns here on btt recently but I have encountered  bounty campaigns never paid the bounty hunters at the end of the campaign period. Not to mention these projects, some of them are now scam, but some of them are now very successful after the campaign, and  they forgot to pay their advertisers at the end of the bounty period. As a bounty hunter like me , its very important. Its really pain when you are advertising an ICO for month/months but in the end you got nothing. As of now, I only joined a bounty campaign which handled by bounty manager with good record here.