Even if the faucet is earning 10x as much as you are it is still earning very little. Remember that you are making only pennies per hour using a faucet. A faucet would need to make a massive number of visitors in order to make any kind of impressive profit.
Even if the faucet sites get some 1,000 unique visitors a day, they can easily make some $100-150 per month from displaying the ads. Most of the faucets sites use adverts from 6-7 different ad providers.