I heard it back in 2011 where in there was a huge hype of mining Bitcoin using GPU's and there were numerous facebook groups where they posted they rigs and also had many tutorials for other to follow or even customize their rigs in order to work better.
Well. I heard it from my classmate in our school. I got interested because my classmate gain income by using bitcoin.Furthermore, I study all things that all about bitcoin.After that, I discovered this forum that you will gain much money by joining in signature in bitcoin forum. As of now I and my classmate earn income together.