Airdrops will give you shitcoins, that might never actually go up and your wallet will get filled with such tokens until you stop collecting them yourself. Like I said, most of the airdrops ask for a long of personal info and you should be careful.
Right, still i'm holding over 100s of Airdrop coins in my wallet but no value on the market, that means all of scam/shit coins. I have been participating a lots of airdrop campaign but i got payment from 3-4 projects most probably even some airdrop ask to complete kyc to get rewards, This is how they trap people and grab people's important personal documents.