Black Friday Deal Of The Day By Matthew Yglesias | Posted Friday, Nov. 25, 2011, at 11:21 AM Tweet MYSLATE Save this story. Follow all Blog articles. Follow the Moneybox blog. Follow stories by Matthew Yglesias. MySlate is a new tool that lets you track your favorite parts of Slate. You can follow authors and sections, track comment threads you're interested in, and more. I'm not really sure why anyone would want to buy this at any price.