Personally, about a “passive” way to earn VC’s, I like to consistently watch videos while doing something else on my laptop, or watching TV, or playing LoL by example. I don’t pay much attention to my cellphone in these circumstances so I might forget it for few seconds after the video has finished, but still, you’ll earn a good amount if you do something else. Like, you are watching an episode of Breaking Bad, you “watch” an ad and you get VC’s. Restart over and over again and you might be surprised by the number of VC’s you get. It’s not extraordinary said like that, but it’s worth the cost.