I first heard it in a facebook group. They were discussing about bitcoin. They even posted some links on were to earn bitcoin. Others posted their referral links, later did I know that the links they've posted was just a faucets sites and they can earn small amount of satoshi in their referrals.
Well i heard it from my friend he was earning money from it. So he suggested me to use also Bitcoin. He was using a Blockchain account so I am using that also now.
I have made some bitcoins now from claiming faucets Im currently investing in some altcoins like ltc and dogecoin.