Who manage of airdrop or called devs have a rules for airdrop including preparation of project,If do you think that devs post a thread that gives apllication form for free and active on social and website have non malicious info like link or visual bad codes affect for application is considered free to join, but if you encounter devs need amount to whos joining it is not consider airdrop and that persons was making any amount and get to scam our participants gives fee to get token.