I don't trust this method of earning. It could turn things upside down when these projects get listed on the exchangers. Many times they fail due to airdrops only and many time they fail due to bad reputation of the project itself. So it's not worthy to get into these airdrops but people do get into them as it is free and you have to do nothing much but just get yourself registered or something. One thing is sure that the companies do get huge publicity due this method.

Also, there are fewer projects which can start airdrops when they already listed on the exchanger. This project can be good deal though because we already know that they are working and worth something.