First of all, thank you for informing us. Surely most of us already experience that situation. But you should not expect too much when you join any airdrops whether its true or fake because tokens given in airdrop are very small and negligible because you don't have to do anything, you just joined and wait. Less effort means less tokens. Also, you should also be careful in joining any airdrops because you are giving away bits of your personal information that might lead to compromising your account.