yes, it is true that you join a gift or Airdrop You can earn coins, say you follow a social media gift or signature campaign, and the project has been successful, and you have completed your work, and you have fulfilled the terms and rules given by the manager, You will get a token / coin, if the following Airdrop is easy, if not mistaken I just fill in the registration and I just wait and will get coin, but many say Airdrop is now a lot of SCAM.