This thread seems to good to be true, a month back i stumbled to see another post like this and when i signed up the asked me for ID card verification and when i did they accepted it and after few days they rejected it saying my ID was not visible, they asked for another document, this is sure a document collecting scheme.
Therefore, be careful when participating in an airdrop program. Don't let us be tempted by a small gift, but we have to submit personal documents that we have, especially if it turns out they are proven not to pay.