Yeah, I would not count airdrop as free crypto also anyway especially my old email back in 2018 just got attacked by a lot of email bombs and I did not even bother to use it anymore for just attempting these bounties or airdrops.
It is like you're also selling your email address for a worthless token anyway so yeah it is not really what you call it "free". I can even recall one particular email that day trying to steal the private keys of my MEW by trying to bait me into their phishing site.