When the tokens from the airdrop and ICO proceeds are not listed on the exchange, then it is a scam, I say this because the developers have the money from the token sale and they can add some liquidity on the Dex exchange, no one controls the ICO or Airdrop, because we have seen several an official report from a new project which says that the project team is not responsible for their chosen investment and I think we see that risk all the time so always do your research and don't easily invest in new coins