The point here is does the bounty campaign owner really care our accusations here? I'm sure not since they decide not to pay and whatever the result of their actions still they already earn a money from their ICO or anything names what you possible call it. Although this scam accusation to be created by members here is good warning but one thing is for sure after they dump that project they will create new so better be careful next time to avoid the same scenario.
Of course they don't, as bounty hunters usually have very small reach outside of other bounty hunters. They usually follow each other on social media channels, and it's very easy to just ban them on telegram. That doesn't mean that they shouldn't try to do something about it though.
Who knows, if OP manages to get enough of bounty hunters, maybe something could be done, but looking at bounty thread, majority of bounty hunters are either inactive or banned, so it won't be an easy task at all.
By the way, how come none of the bounty hunters tagged @UHIVESocial account yet? I mean, I know that it doesn't mean much and that account is abandoned, but still if you feel scammed, you should leave him a tag.