Based on my experience/observation most airdrops are scam but not all, well it depends  if youre lucky enough then ofcourse theres profit on it, in airdrops its easy for you to earn espescially you are still  newbie right now and be sure you have a lot of time for it but dont expect too much from it unlike joining bounty campaigns much profitable rather than  airdrops, personally i enjoyed joining those campaigns coz theres clear profit no need for LUCK it only needs your time and hardworks.