Mail + airdrop + wallet details= scam
-snip- Gmail is a street where a lot of fake scam airdrop mail can be found.
I agree that the airdrops offered through gmail probably scams. Unless you follow the sites or the platform that offer the airdrops, it is better to ignore the airdrops offers on gmail. It is not a new issue, we already got hundreds of airdrops offers on gmail since few years ago. But newbies may be not aware about this. So, it is true that we must let them know.
Most of these airdrops are scams so newbies should avoid these airdrops. Scammers especially promote fake airdrops on social media.
I don't how the percentage of real airdrops and scam airdrops. But I know that most airdrops are worthless, they pay us for cents (too small money). FYI, I never joined again airdrops due to so many times the failure in working airdrops. I concluded it jus wasting time.