This airdrop really should have been thought through a little bit better. The gas prices on the Ethereum network have skyrocketed because of people constantly bombarding this contract with higher and higher bids, for coins which will probably not even equal the transaction fees in value. Meanwhile, legitimate users on the network have to suffer and some projects are even failing because of this sudden (5-10x) increase in transaction fees.

Please consider the effects that your promotional campaigns are going to have on the network.