Sadly, there are blind investors that support the project even without doing further research. That bounty is an obvious scam and those people that keep joining are not looking at the feedback and they post just as they're doing it with hope or just trying out if it will work.
And whoever those people that create bots to continue posting on that thread and others, they all have the same reason and purpose. It's automated and they don't see the trust feedback of the manager or any update about that bounty.