Its part of the experience as a bounty hunter. In my case, I have not been paid in half of the bounties I joined especially when I was new and joined any campaigns I find. But now im more particular in joining bounties and look deeply to the project and the team running it.
Yes you are right. To be honest I've aldo tried not being paid by the bounty campaign that I am joining. And as a matter of fact I felt so down that time because all my efforts are just useless.
So sad to see your post that they don't pay and you didn't receive any rewards and you don't get you're profits.
Actually this is my first time to join bounty campaign because I'm only new here. But despite on what happened to you I think still I don't want to quit joining in bounty campaigns. I'm here to earn and to do that. I need to join and participate in bounty campaigns. No to quit.