Besides earning through free claims every 15 minutes there are also a few other ways you can earn & some bonuses too…
BonusBitcoin
You can earn up to 5% daily bonus if you made minimum 1 faucet claim the previous day.
You get 50% of the earnings on referral.
You can increase your income by playing games which includes adverts too
You can collect a number of Satoshi by completing surveys and offers.
According to a customer review, you are not really going to see any sort of high income through this site. You will be paid very little in return for your time.