A lot of these scams are appearing and even uses any big exchanges as their marketing strategy. I saw this Telegram group having Thousands and their members are having conversations about sending their BTC and thanking the team for sending back their BTC added by 10% as an airdrop. It was very sketchy though as their conversation flow was always the same. I just hope newbies here do not make a mistake by sending BTC to any malicious address. Don't be greedy guys.