I have not received any money from airdrops in this year. You can see many fake airdrop in social media section which is more fake. A good project never distribution free token many time but some project giving free money by promoting airdrop. I think airdrop help promoting for a project marketing.
airdrop always have tough phase where the rewards was some measly amount after some massive ones.
right now we are in that phase, so many airdrop appearing but actually only very few can be worth something, many of them usually just waste of times.