When i used to participated a lot of airdrops and those were valued but now ost of airdrops is scam, try to trap people for their own benefit as op said. But valid airdrop also available now this day. Good project don't run Bounty but airdrop with very small amount. Even nft project give away their nft Through telegram and discord for free and many nft still value for sell. But i avoid airdrop personally cause i Don't have patient enough to trust such shits
Now airdrops and bounty don't get much payment. But few years ago airdrops got good amount of payment. But now most of airdrops are scam. But now bounty is very less payment. Most of the bounty scam. So If it continues then at some point everyone will stop doing bounty for the scam.