Bounty scam is going nowhere, scammers will doing their work, trying to use hunters and running after cashing out, hunters should just keep doing thorough verification before joining any bounty, that's the only way to avoid been scammed.
Even thorough verification, they will still be scammed if the dev team decided to run away with their stash. The bounty scam will go away if there will be no more hunters that are willing to participate their program. I think that's the only way they will be stopped. If only participants will just join bitcoin-paying campaigns handled by reputable BMs here, then only serious projects will eventually make their campaigns here in the forum.