It works like the stock market, but for social media. You earn a virtual currency called "eaves" on the site based on both your social media activity and how much people buy/sell shares in your "stock" ... once your stock is valued at 30 eaves per share, you can start doing missions, which is how I promote my YouTube channel. I give a 10,000e "reward" for anyone who will subscribe to my channel. Admittedly it doesn't really help my view count any, but it has gotten me over 920 subscribers so far.