Till what moment last Airdrop campaign? I hope that the team has taken care of safety and multiaccounts will be stopped, otherwise you will have many problems as such dishonest users will be able suit dump after a release of the project to exchange.
That's normal to all projects that has an airdrop and bounty. Some of their airdrop and bounty hunters are dumping the coin after listing on some exchanges. I think Tachain will make a solution for it.