During the last months I tried to sign up in several airdrops, but I realized that most of them were projects without solid bases and never ended up in really valuable coins or with innovative ideas. I think that out of a total of 50 airdrops in which I registered, I received about 30 in my wallet and of them only two reached a certain value in the market, so I think the security risks involved in sharing your information when you sign up in these airdrops are not worth it compared to the profit potential they offer you.