The max you will get in a genuine airdrop is $5. Unfortunately that amount has now reduced a lot because of the current state of crypto market . It is better to concentrate on genuine Bounty projects than airdrops. I personally prefer signature bounty above all kind of bounties.
Indeed, airdrops cannot be expected anymore because the rewards are very small, if we rely on gifts, I think we need a long time and for btc signatures it requires good skills and they cannot follow it.
If the bounty and airdrop are done, it will be better.