I see a lot of airdrops running here and there.
Why would people launch them? They pay gas for creating a contract and then pay gas to transfer tokens for free. So I guess there must be a reason and a hope for a return on these investments.
You cant stop those projects to have airdrops since this is one of the ways on how to distribute their tokens.They would really allocate funds for them to distribute free tokens among to those airdrop participants.They are not just giving it for free but at the same time it do have a motive on might getting an investor too.When you try to see those airdrops most of them do end up on failing because most investors do see these coins as craps and only few can really able to succeed.