Cool site, I saw another somewhere, don't remember where, and it is great for you, because if someone does not have a coinbase.com account and they use your faucet and buy or sell at least 1 BTC you will receive $% worth of BTC from CoinBase. You should probably be able to get many of the inputs.io faucet owners to use your coinbase API faucet script, and get some donations from them as well, so that they can continue to using their websites for a faucet.