Any idea what this VigLink thing is? I keep noticing on some of my older posts a word here or there has been changed into a hyperlink. It looks like these hyperlinks take you to ebay. There's a hover-note saying "Link added by VigLink". If I edit the post, I don't see any embedded link content. And if I save changes (without actually changing anything), the link is wiped out / back to plain text. Any idea what this is? Is it authorized?