Or are they all scams
OP welcomes you on board well in case of next time when writing a post that contains one line or two lines you need to add some write up to it, so to tell us the reason why you made the post take notes of this OP.
So back to your question are airdrops all scams? well to me I will say not all of them are scams 50% of them are still offering better coins that are worth it, but to me, it depends on the project you are airdropping.
Well there are many guys in the crypto space today who are still making millions of dollars just for airdropping, you just need the right project to keep you on track.