there are so many scams how to find out about good airdrop ?
It seems to me that you need to participate in all airdrops, you will find out that it is good only after it will have an exchange listing.
what can I say is that product is the most important part of the project for me. I do not invest in ICOs or do not take part in its airdrop, bounty without a ready-made product and only with airy promises to do it in the future. So, in my opinion existing of the product increase the chances of the project to conduct sussesful ICO and prosper in the future
Of course ready-made product it is a good, but I usually pay attention to such things only when I am investing, when I am taking part in airdrop or bounty in worst case scenario you will lose your time, which is also a valuable thing actually, sometimes risky ICO appears to be good, and because there where not many willing to take part in it its token price can go skyrocketing.