First of all I have stopped partaking in Airdrops long ago for my own personal reasons and secondly, why would I want to pay any thing to pass kyc that I dont want to do In the first place? I might do a KYC for an exchange I really want to use if I feel it is important to me but not for any other thing most especially not for Airdrop and i dont care how much it is. So its a No No for me.
In essence, giving KYC for the Airdrop program is very ridiculous, because there are other things that are more important than Airdrop, so it's not worth giving KYC to any Airdrop program in the crypto space, that's the point, but for popular exchanges like Binance, Kucoin, Gate and Okex I think giving KYC wouldn't hurt.