We do not know, but I've gained a reasonable amount of money for some airdrops. Some airdrops require to do KYC, that I won't participate because they will get your own identity for just a few bucks and its not worth the risk. Just be careful on clicking links of those airdrops, it might be a virus or their means to hack your computer, we do not know.
It depends on different factors. How their lives easy or difficult? How high money they can receive from airdrops compared to their usual daily income? How about the level of their needs on money (for them, for their families) at specific time points, on which airdrops announced for participants), so many factors. However, whatever reasons force them to join airdrops that ask them to do KYCs, they should know all or most sorts of risks before accepting to join and throw away their identities.