Airdrops were so popular among the crypto-community over the years. One of the key features of the airdrops is, it gives every participant a chance to get some free tokens by completing few tasks. Most importantly it is totally free of charge. But nowadays we frequently see a trend where the organizers of some of the airdrops ask to send a small fee prior to sending the tokens. In some cases, they put a condition saying that in order to withdraw tokens or any fund received from the sale of tokens, it is mandatory to take part in their ICOs. I would rather call such events as "Scam-drops" as they not only dilute the meaning of airdrops, but also make people to move away from future events due to lack of trust.
Airdrops, scamdrops in 2020, both are fraudulent; so if you are a newbie, you need to limit, reduce, and be cautious of the details you release while filling forms and joining several airdrops here and there. Another skill is that, do not use your personal email for aidrops; ensure to always use a seperate email for airdrops. Use a seperate crypto currency wallet for your airdrops too. Stay vigilant.