Bounty Signatures/campaign

[Keptone]

I'm New hearing about this, pls can anyone enlighten me, on bounty signature/campaign, how it works?
How to always get a legit one, (I:e if a project bounty end up to scam, or pump and dump there project, won't this affect the promoter's, I:e user's who promote them via signatures.

And what are the available, and paying signatures/campaigns...
Kindly enlighten me, very much grateful


Regards