How do you make money with airdrop?

Could you elaborate on how one can generate income through airdrops in the cryptocurrency space? I'm particularly interested in understanding the mechanics behind it. Are there specific strategies or tips that one should follow to maximize the potential gains? Also, are there any risks associated with this practice? How does one determine which airdrops are legitimate and worth participating in? And lastly, what are some of the common mistakes people make when trying to make money through airdrops? I'd appreciate your insights and expertise in this matter.