It's really upsetting to experience something like this, the work done so far to promote it goes to waste even having to hand over personal data to them. I hope all bounty hunters should be more careful in choosing the projects to be promoted.
Those hunters have been wasting a few months for nothing. The only problem is so many blindly hunters were taking any projects. They didn't even care whether that was scam or not as long as they can participate in so many bounties at the same time and they are feeling so well about that. I would not be surprised to see any case like this. It has happened since a few years ago and it's still happening till now.