As for airdrops, the highest I have ever had is just $3. But some bounties I've participated in have given me good money. Comparing both, bounties are far better than airdrops especially of the participants are only few.
In 2017 I received $ 500 from an airdrop. And that was the only time I received money from the airdrop. Other airdrops are worthless and I cannot sell them at exchanges. And I agree with you, bounty will help us get more money, but we need to wait longer to receive money.