When you see this on your computer, it's already obvious or at least sus that this is a scam website.
I think no one in the right mind would be going to put their wallet private key just for a sketchy giveaway like this, I mean you can't risk it especially when you have a high amount of investment in your wallet.
Remember that there is no website that is gonna required you to put your private key especially in a giveaway, I mean there are some legit websites but don't do it for a giveaway.
Having the same thought. Fortunately, it never happened to me, and for sure I won't fall for it but I am afraid for the newbies who are only getting started because some of them might not have an idea or clue that they shouldn't share their keys with anyone especially on a sketchy website. That is why I will recommend for newbies that if happens they encounter this kind of Airdrop they should be wary and get away from it because there's no doubt that this is definitely a scam. Upon joining Airdrop, you can provide your wallet address but don't ever give your private keys.