Like what says by others , it is the transparency that needs to be from their ends to the participants , and also check those who are participating because sometimes there are shillers that the team is payign to make their airdrops looks real.
and besides this is a free participations , if the team is asking for deposits or something that ask for even small amount then best to leave that alone because
for sure they will scam you for all reason .
What I see is that identifying real airdrops from fake ones has become an adventure, especially when we talk about airdrops based on Telegram. There are hundreds of games with huge communities, and over time, the developers' behavior might help us determine whether they are running a legitimate airdrop and project or if it's just a money and time-sweeping scheme.
Projects that offer honest airdrops may be owned by well-known teams and have highly reputable partnerships, but the value of what the participant gets depends on his luck and through the project papers, he may be able to guess what he will get, What I see is that airdrops have largely become fake and aim either to benefit from the participants or to scam them, with only a few being a stroke of luck for some. Therefore, I don’t think they are worth the risk.