My suggestion, if you see a potential from a project that provides airdrop, then you should do it. However, the task of airdrop is usually not too heavy. It is very difficult to determine which projects are really potential. In fact, projects like Hamster are very big, and people think that it will provide great benefits, but the current fact is that many people are disappointed. However, a project will not be known whether it will be profitable or not until it actually pays and enters the market. So, when you feel that the project is good enough, then work on the project.
Hamster was too saturated as most of Telegram tap-to-earn projects are, they are all riding the hype of Notcoin's success, and Notcoin was only success because it wasn't saturated.
If you see a millions of users doing something, it's highly likely it won't be worth much.
Also if there is no use-case to it whatsoever, but, yeah, more people = less money for everybody involved. Simple truth, yet many out there thought HK would be a life change. Some even quit their job for it.