most of the airdrops are scams, most of them are only looking for followers on social media ... but many are also good, it is very difficult to judge a good airdrop ,, I personally always participate every time there is an airdrop, if paying is good if it doesn't mean a scam ... that's all my step in following the airdrop
Yes you are right most of the airdrops are scams but not all of them are still legit but others need bnb funds to be eligible others as airdrops need to buy their tokens or hold tokens for snapshot airdrops but there are also airdrops that only increase the number of followers like on twitter be careful when finding airdrops so as not to waste your effort in joining.