Hi Guys,
Airdrops are just combination of your data like email, bitcointalk username and password through a signup form.
With this data, They cretae a database and keep selling to ICOs, This is how you got membership of some ICO groups automatically.
Another agenda is to apply this email and password to login to different exchanges so that your fund can be stolen. Never fill any form offered by
unknown ICO airdrop.
Thats why there are disposable services for email, phone number and even wesbites which will generate your fake indentity and street address and other sorts of things. So if you are person who fills airdrops and don't want to do the research use available tools and don't provide real information. Simple as that.