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.
We're are just wondering why we should give them a donation, in fact they will give us free coins. Or in the other hand, why they should need our donations when they have a lot of convertible coins in their wallet. With this, mostly people will accused that certain airdrop is a scam. But not only with that scenario, because some airdrops is hardly to find which one is legit or not until we've been involve with them. So, it is better if we really not engage more on airdrop.