I can confirm that I have received a very low percentage of airdrops in which I participated voluntarily, but I was stupid of some of them and therefore I advise you not to give up because one is enough to find a small capital for free.
Yes, basically giving up is not a good choice for anyone because while you can still try, why not continue, regarding the scam, it is a challenge for everyone in terms of researching it in order to find the best among the good.