Rhexxer Most of the new coins are distributed to people just like that, for some actions, for example, joining their groups in social networks, likes. This is done to introduce and attract new people.
Yes, most of these coins will depreciate, disappear, but some can grow well, given that during the appearance of the ether it was distributed and if you look at how it grew, you can only regret that we were not there. Therefore, entering airdrops, we hope that some coins, although they will not give such growth as bitcoin, ether, but they will give good growth and will please us. In my experience, I already have some coins that have value for simple actions