What kind of airdrop which itself asks to buy a coin ... it's funny .. it seems like a scam, it's not known at which round of airdrop the developer will run away with money .. Stop fooling people. otherwise soon be in the prison .. this is my advice to you ..
If you don't like, you can go. Personally I think it's a good move of Dev to stop people who received the previous airdrops to dump straight away. That's actually keep the price stable in current.