From my own experience I can tell from all the airdrops that I know the top projects were only: Vite, Ontlogy, Dfinity. All others were shitcoins

not all airdrop launched by ICO developers is bad ... there are some airdrop coins as you mean ... there are also some that are really good and have high prices on the market ... because I once got an airdrop coin that reached $ 100. ... and there are some other airdrops that have high prices ...