When you look at two of the most popular ways to get free bitcoin, you will find yourself going to either FreeBitcoin or Cointiply.
Both websites offer the opportunity to claim free bitcoin every hour. They accept people from all countries and have hundreds of millions of dollars in available bitcoin.
Due to gaming aspects of their websites, they profit from the lost bets of users on the sites and use this pool of funds to fuel the free bitcoin they give out. Anyone can easily sign up for both sites, not gamble their coins, and withdraw. That's what people who actually want to make money should be doing.
However, another option is to leave your coins on site and let them grow. They both offer interest rates and pay interest daily on your active balance.

4.08% and 5.00% interest rates far surpass what banks are willing to pay anywhere in the world. Normal banks pay interest due to the loan income they make on your money - faucet sites pay interest based on the gambling losses provided by your coins contribution to the bankroll.
Both being legitimate sources of interest income, people need to take these sites more seriously as the interest income available starts to be backed by more profitable methods that are making legitimate interest dividends.