these things seems waste of time for me. instead of hoping to won some coins from this system airdrop is better. 
Freebitco.in is a faucet site that allows users to earn free bitcoin without risking any money, and it have been paying out all the faucet earnings earned by users for a long period of time without any issues, so I don't think there is anything to complain about a site that allows users to earn free money.