Does anyone have advice on how to distinguish authentic airdrops from scams?
When you join an airdrop, there is a free distribution of tokens, so you wont loose anything besides your time.
But The thing is those tokens are worthless if the airdrop is a scam. But as you said even if they are worthless you don't lose anything other than time.
And besides that as many people have already pointed it out its very easy to figure if the airdrop is scam, at least easier than to spot a scam ICO.