In my personal experience, I first heard of it 1 year ago in a online forum game, people sold gold for Bitcoins, around March, gave it no importance at first. Now im kinda utterly commited to it. Really an interest subject of study.
i hear from my online game friend 2 mounth ago , but i dont know how can get bitcoin from BTT forum , and I tried to does not matter to my friend , but 1 mounth ago my friend show me the payment proof from bitcoin , and i very curious.
when i ask he , he telling me about bounty and how to get bitcoin from participate bounty and yesterday i trying to learn to follow him but he tell i must have a 30 activity for joining a bounty because an ICO rules. yeah i can start to got activity with a good post but me always need a more knowledge about cryptocurrency and other bitcoin discussion because knowledge is important for us.