I am not very active in participating in airdrop projects that appear on this forum or any other media channel. but when I opened Telegram I accidentally came across an airdrop DEFI (YFI) but it requires participants to send 0.005 ETH first. I think anyone who has joined the project or hasn't even had time to join in, should be even more alert. this is just a warning from me.
I have also seen many airdrops that require participants to deposit money first. But in the end they are just scam projects and disappoint many people. In addition, you should not waste your time on airdrops, please participate in bounty if possible. It will bring you more money