Yes i got scammed by some airdrop, Giveaway and ICO too. but i dont feel regret it cause you know experience is expensive and it makes me more careful when i do some transaction. But thanks God, for ICO, i only invest in a small portion. About the giveaway and airdrop cause we only asked to do some task, so it doesnt matter for me, if they are scam or not. So thats why research is the important one before joining the airdrop, giveaway or ICO.