If you are newbie and you are looking for ways of making some Bitcoin and other altcoin, be very CAREFUL with AIRDROP campaign as many of them out there are out to scam/milk you with the little ones at your disposal. Sometimes, they are out to get your personal information like email address, etc and sell it out for money.
This is exactly the business that they've seen by taking advantage the people who likes to join airdrops. They're sell it to marketing agencies and that's why if you have something in your email like an endorsement from an ICO without remembering you've signed up one. Then the past fill up application that you have filled with an airdrop or of the same already sold or sent it to a marketing agency so that you'll be one of their recipients.
Some of them will tell you to send some amount of BTC or ethereum to their address as fee for you to get the aclaimed airdrop reward of which they will later run away and mute their telegram channel.
Be warn is to be armed.
This never gets old and too bad that many still gets caught by this scam.