I wish bounty hunters would get smart and not join certain managers campaigns, but unfortunately bounties require little effort and people take the risk.
This user in question should have already received payment it run the campaign before starting the thread, the participants will not have been able to prevent this, as someone with dubious intention would keep the payment regardless. I'm not buying the trading story, looks like a ploy to buy some time and clean up their tracks to make a proper exit.
He has also restricted posting in his official Telegram group to prevent participants from claiming their rights.
The group can be reported to telegram. If enough people report it, it should get taken down