Airdrop is a big help specially to those who needs it but what is the possible way to know if they're a scam or not? They're giving away some tokens that are really off value. Such a waste of time asking for it anyway.
Recent airdrops became useless and not much of a value. Except google form and some name there is nothing behind.
Main concept for 90% of these is to collect "donations" to get "more tokens".
Most of these tokens will never be created as there is no token address, etc.
If project wants is legit you can find:
- ANN on BTT
- Website
- Whitepaper / Roadmap
- Token address
- Team presentation
- Achievements of the team, so far, prior to airdrop
Of course it doesn't mean all those projects are legit. Example is Corethum, where team on website was composed from collected randomly linkedin profiles.
For sure, if project runs airdrop, there would be no donation required at all and this is first sign of scam.
Donation can be optional or project might have automated token sender, which requires to send 0 value transaction to specific address to get tokens back (if ETH platform, usually sender has to cover gas cost).
So, in general there is no unified measure to differentiate scam from legit airdrop/project.
It is only time. It is worth to apply for these and check project status as sometimes it is possible to find interesting projects and then buy more tokens even.
General idea of the airdrop is to get community attention around project, so people will get involved and potentially invest or propagate word about new initiative. As such, airdrop is a good think.
There will be always inappropriate use of this, so at the end of the day it is our own judgment which airdrop is worth and which is not worth to apply.