I would like to become a signature bounty hunter. How do you find potential deals and how do you make them happen?

If you want to participate in signature fund a great campaign project first before you participate so it will not go your efforts. Find a good project with a great team and great product so you know that the campaign you participated is good.
Yes, you are right we need to choose the right project for getting paid, some people can't even raise enough money in crowdsale. This makes them many people afraid to join the bounty campaign, once we get some experience we will choose the right project for getting paid.
This guy is no longer looking for a signature campaign. He wrote above that now he himself is the creator of the project and such a campaign. I think now he has figured out how to do it.