That is the saddest part that will happen to us bounty hunters, after working for 2 to 3 months on a campaign they wont paid us. The only thing that we could do is to accept it, because once we join in a bounty we accept to whatever happens on the project.
So why not change the terms and move on from bounty hunting? There are a lot of different things that bounty hunters can change to. Look for the bitcoin paying campaigns happening in the forum. We have new ones coming up every week and if you are working to develop your writing skills and have a flair for it join them. Of course earned merits become a obstacle here but one should take it as challenge.
No don't just accept it report them in the scam section so people become aware of their wrong doing and no bounty hunters will trust them again if ever they do another round of campaign, and investors will also not trust them, if they scam their bounty hunters they will likely scam their investors, so don't be just quiet make a noise.
Eh not every investor comes to this forum to check whether something is a scam or not. When some known close friend tells you to buy something to get rich these people end up sending their money there. Of course they are not professional investors because to be so you need to be cunning and clever before risking your money.
Bounty hunters will need to open their eyes and accept that all projects are like that only.