Well,you join in many airdrops maybe (without research) so you join any airdrops
its spend your time,don't pay you.
i suggest you to continue join the new airdrop project,but with research.
so many airdrops is fake,scam.
I would not say that a project with a whitepaper is not a scam, history has shown us that there were lots of scam projectss that had a whitepaper, had a working prototype and still turned into a scam.
Even though there are legit people (without fake names, fake profile names/LinkedIn) there is still a risk that the project might turn to scam(partially) on every moment.