The following are some of the easiest way to figure out a scam airdrop
1. They will ask you to donate
2. They will ask for your private key
Feel free to add yours in case there are many more.
Best regards and happy airdrop chase.
Sorry but all airdrops are totally shit for me, because most of the member for a couple of months ago actually there are many of them that has been hacked their account to their mew, because of giving their information in joining in any form of airdrops programs by the information to their applicants like private key and eth address and email.