I guess these airdrops are going to be totally scams in the very near future.  If you need to pay the rent, just create a website, a token and advertise.  Then ask for .01 ETH to participate in the airdrop.  Sounds pretty good to me.  If a 1,000 people sign in, consider the rent paid.  Then they disappear and repeat the same thing next month. 

And everybody is concerned about bots completing multiple registrations.  I think we need to be concerned about bots creating multiple Airdrops.

Just my 2 cents.