Since it will cost you only gas for sending transaction of 0 ethereum on that prescribed address don't you think lot of people were try to abuse the airdrop ? Asking money isn't good as well because no one will be willing to pay. You should come up with some better solution to minimize the cheating and expected abuse.
Only one send per address is allowed. A person can send 0 ETH from his/her wallet and receive BGF only once. They can make multiple wallets to get more BGF. And I encourage it as our early supporters deserve some benefits. haha.
Does that mean if someone is highly motivated and creates a thousand addresses that person might receive the majority of the network?