Exactly that is what I wanted to do. They said this is only 1$ but today I got few emails with 3 different airdrops like this. I don't think this is a coincidence. Just think 3 airdrops x 5000 people and you will have nice 15000$ in your pocket. I don't know what cost to issue a token on eth platform but not so much for sure.
If they want to avoid spam or double entry just like other airdrops they can ask for eth wallets with 0.1 balance, more or less. This is a proven way for airdrop and works very good.
I am out !!! Waiting for 2 or 3 round. Watch out. Just my 2 cents.