You do not need to invest money in projects that you just *like* ...

There must be specific criteria for selecting new projects, then your chances of earning money will increase!
I do agree with you, we must need the effort to do so. There are many projects out there and there are also many rules to earn money, airdrop is a free token that they are going to distribute to everyone. The best thing in airdrop is you don't need to exert more effort to earn money, it's all free, I mean easy money that you can get and trade whatever current price is on the list.