A blogger has noticed that Gawker Media, publisher of Valleywag, Gizmodo, and other blogs, makes its sites' traffic numbers public, as well as its advertising rate card, and done the basic math. But if you believe a revenue projection that ignores discounts off the rate card and unsold inventory, then our publisher, Nick Denton, has a bridge to sell you. Maybe even some ads, too. [Shylock Blogging]