VigLink is a way for blogs to make money, especially when google is messing up your AdSense (like they're doing to me for some reason). From what I understand they create hyperlinks on thing within your blog that you have talked about, but may not have thought to link to the company's site, because maybe they weren't your main focus. Then they give you $ for the traffic that those links (and some that you have already made) get. In 2015 I made over $700 with VigLink, mainly due to a few of my Christmas shopping posts. So they are totally legit! And you can make way more money than with AdSense (or at least I have in the past). Plus you can use both at the same time, so you can earn money from VigLink's links and from the ads that AdSense puts up. Win - Win!